*Note:* You won't find colors like brown or grey on the chromaticity graph in this video because it's only a 2D slice of the _actual_ graph. Actual chromaticity requires a third axis, a lightness/darkness axis, to show the darker versions of colors. Brown is dark orange, grey is dark white, etc.

@FactFlaresDaily

4 жыл бұрын

So, how does the "star color curve" vary in the 3-D chromaticity graph? Is it the same or do we get to see dimmer versions of stars too? Awesome video by the way.

@HoSza1

4 жыл бұрын

So brown dwarf stars are actually orange with a low intensity. Then also that curve you embedded in this 2d slice of "all" perceptible colors, it must be only a 1d slice of some 2d surface that is derived form the spectrum emitted by a particular star.

@LuisAldamiz

4 жыл бұрын

I'll be the nerd clone today: I think that you oversimplified when you said we have red, green and blue color receptors, it's actually red, yellow and blue (although of course they see a range and only peak their sensibility in those frequencies), RGB is a convenient color generation using light but not what we see, and that's probably why we discern better the differences in the yellow-red narrow range than in the green-blue wider one. Edit: I was wrong: the actual peak frequencies of the three receptors (cones) are typically purple, green (or teal) and yellow. It's the yellow receptor which mostly allows us to discern red too.

@ronnyvbk

4 жыл бұрын

Bei Nacht sind alle Katzen grau

@psychachu

4 жыл бұрын

"Grey is dark white." - ...Holy fuck.

So in theory: if you filtered out the red and blue from an entire star in a giant Dyson sphere. You would form the most obvious “lighthouse” to other life in the galaxy... a green star?

@jan861

4 жыл бұрын

Cool idea. Copyright: You?

@cleitonoliveira932

4 жыл бұрын

That's a really cool idea.

@gregoryfrancis7389

4 жыл бұрын

I don't think so because aliens may see light in an entirely different way. There are not green stars, in part, because of the way humans interpret light. The chromaticity diagram is for humans, other animals and insects have different diagrams. They might experience something like a green star.

@NoNameAtAll2

4 жыл бұрын

any filtering away from black-body curve would be an obvious beacon

@Croissantrophy.meme.channel

4 жыл бұрын

@@gregoryfrancis7389 it will still be different for them and they will notice, whatever color it is on their spectrum

“Why are there no green stars?” Me, an intellectual: *laughs in super mario galaxy*

@ScienceAsylum

4 жыл бұрын

One of the best games every made... incredibly misleading astronomy and physics.

@carterjohnson3420

4 жыл бұрын

No purple stars...? *Cries in Wah*

@Tom-jw7ii

4 жыл бұрын

We just need to visit 120 star systems, then green stars will begin to appear throughout the galaxy

@angrybirdsfan9826

4 жыл бұрын

"why are there no _cube_ stars?" me: *_laughs in minecraft space mod_*

@parallaxnick637

4 жыл бұрын

@@ScienceAsylum I have to wonder, how many people actually know that "galaxy" and "star system" are different things?

I love when I see a simple question like this that never would have even crossed my mind

@mathadventuress

2 жыл бұрын

Hi Dotson :)

When you don’t think you’re going to learn anything and end up learning everything.

@giarnovanzeijl399

4 жыл бұрын

I also came here expecting to learn nothing. Turns out I already knew basically everything here.

@saswatsarangi6669

4 жыл бұрын

It's like I'm enlightened or en- coloured

@betazep

2 жыл бұрын

Exactly

@pedrocruz4409

2 жыл бұрын

I don’t think I retain much. These science shows are entertainment for me.

@jaybee6701

2 жыл бұрын

That’s kinda what this channel is about…

How to find out that you're dreaming: Normal person: Look at clock or pinch themselves. Crazies: Try to find a green or purple star with telescope.

@nrdkraft

2 жыл бұрын

Good idea to trigger lucidity!

@a_diamond

2 жыл бұрын

Okay, thanks.. xD

@a_diamond

2 жыл бұрын

@@nrdkraft That's true. Just do something deliberate.. well.. "just".. xD

@carlosalejandroalvarenga4913

2 жыл бұрын

You know WHAT. In a dream once the sun was purple. Should've known

@charginginprogresss

2 жыл бұрын

> Normal person: Look at clock or pinch themselves. Me: look at own hand. Tip: don't do it. It will look horrifying.

If homestuck has taught me anything, is that a green sun is bad news.

@crazydragy4233

4 жыл бұрын

Spike Link lmao HS is literally everywhere i swear

@zanderoneil3405

4 жыл бұрын

Good thing they don't exist. Ness is NOT Sans btw.

@flameyoshi07

4 жыл бұрын

Boi

@thomasraahauge5231

4 жыл бұрын

So is green and purple cheese . . .

"Those colors are thermodynamically inaccurate!" I don't why, but I love this quote.

This is the type of info you’ll never learn in school. I’m thankful for this channel.

@IgabodDobagi

4 жыл бұрын

They taught this to us in high school in the 90's. But I learned it first in a boyscouts astronomy class when I was about 12.

@occultninja4

4 жыл бұрын

You learn this in College, specifically Physics and Astronomy related courses. However I definitely didn't learn this in high school, as I barely did anything with Logs in High School so calculating this would have been hard. But this guy did just prove that you can explain the concept to someone who doesn't know the underlying math.

@IgabodDobagi

4 жыл бұрын

@@occultninja4 yeah, they didn't teach us the math or anything. They just explained it much like this guy did.

@Anankin12

4 жыл бұрын

Actually it is taught somewhere. Uni or college. Why? Because the justification for all this is very complicated.

@occultninja4

4 жыл бұрын

@@Anankin12 Yeah you can explain the concept to someone but unless they have the math background good luck trying to show the proof / how the theory actually works the moment Calculus or Linear Algebre get involved xD

I've often seen green and purple stars, but only when I've banged my head hard enough.

I love how all the red stars shown in the video have sunglasses, because they're the "coolest" ones

@nou4898

4 жыл бұрын

black ones are even COOLER

@user-xr6xi5ym6e

3 ай бұрын

Y types are brown dwarf and it’s black

“And yes the sun is white” Me:my whole life is a lie....

@zanderoneil3405

4 жыл бұрын

Don't worry, the Earth is filtering the sun's light so it still looks yellow for us!

@yakuza_suske3189

4 жыл бұрын

@@zanderoneil3405 so in theory is green.... But actually no..?

@flopsnail4750

4 жыл бұрын

If you look at the sun in space outside of the vast majority of the Earth's atmosphere, you would see it as white. (Then you would regret that you weren't wearing super shielding sun glasses because now you have irreversible eye damage because the sun burned a hole in the center of your retina going through your entire eyeball.)

@Will-be-free

4 жыл бұрын

If you look at a rainbow or through a prism, you can see the separated colors from the sun and judge for yourself. Too bad our eyes aren't sensitive enough to see the rainbows from the stars.

@tawkinhedz

3 жыл бұрын

@@Will-be-free not with that attitude *munches drugs*

Congrats on the sliding emission curve with higher surface temperatures through the visible spectrum, it makes things more ... eh ... 'visible'. Thanks to include also the link to human vision spectral sensitivity.

“Science names: they are boring, but descriptive” 🤣

@sadrevolution

4 жыл бұрын

And then I started learning about the physics of electromagnetic radiation and the prof threw conventional current notation our way... :\

@Abhishek-hy8xe

4 жыл бұрын

Yeah flavour

@Lucky10279

3 жыл бұрын

Math has the opposite problem -- so many of the names sound pretty cool, but are actually misleading. e.g. "Imaginary" numbers are no more or less imaginary than "real" numbers.

you're simply amazing, I've finally understood the monochromatic curve and the chromaticity graph thanks to your creative way of explaining stuff. Thank you

@ScienceAsylum

4 жыл бұрын

You’re welcome! 🤓

this was easily the best explaination anyone has given on this subject, i havent heard anyone else make it so easy to understand and grasp. very nice i like the video

The comprehensive recap at the end was a nice touch. Temperature is such an interesting concept, and many things that seem mysterious suddenly make sense when the distribution of kinetic energy is considered.

For this video you get a Gold star sir.

@thomasraahauge5231

4 жыл бұрын

What does it take to get a brown star?

@Aliasbaba41

3 жыл бұрын

@@thomasraahauge5231 Being less massive than it needs to be to reach self sustained fusion and having the maximum peak in infrared radiation. So it is really dark red.

@thomasraahauge5231

3 жыл бұрын

@@Aliasbaba41 I was trying to be funny - a brown star _COULD_ be a poop-coloured "reward" for the less than well achieving student . . .

I love how you joke around for a bit and continue with the topic. It helps me learn more when I am happy than when I am bored.

Why violet is on the edge while it's after the limit of our blue sensor? It cannot be a mixed color from other green and red senors since more violet means less green and red response (it's not a monochromatic color). In RGB code violet corresponds to a blue with some red, but violet should be a dark blue according the eye cone cells response. In HSL code the hue is a loop, blue and red are smoothly connected with the violet. I really want to understand!

@ScienceAsylum

3 жыл бұрын

The red sensor actually has a second bump/sensitivity on the violet end of the visible spectrum. It doesn't get talked about much because it's smaller than the main peak, but it's there.

@IncroyablesExperiences

3 жыл бұрын

@@ScienceAsylum For true? Never heard about that, it's really surprising, thanks!

@IncroyablesExperiences

3 жыл бұрын

So it's not a coincidence if the color sensation "after the blue" looks like a blue + red mix, soo interesting!

@IncroyablesExperiences

3 жыл бұрын

@@ScienceAsylum : I discussed with a PhD specialized in light and laser and he has another explanation. The bump exists but it's very small and it might be the absorption curve and not the real sensibility response curve. The answer might be that purple color sensation is the real response of the "blue" cone, but when the blue cone is at its max response, the green et red cones are also existed to give the blue sensation. This happen especially with the blue cone because its response is far from other cones and it can be excited alone (purple at 400nm). It would be interesting to get the color of each cones taken separately, that's not the RGB primary color we use. For some reason a mix of blue and red gives the purple/magenta color so that a screen can reproduce all colors of the chromacity triangle. Can I have your opinion?

@DANGJOS

3 жыл бұрын

@@ScienceAsylum That's a common misconception. Unfortunately, that graph with the red bump in violet-blue is actually from a color matching graph, and not the actual cone sensitivity graphs. The reason violet appears to contain red still eludes me to this day! I've searched online for an answer, and I'm not sure there is an absolute known answer.

Nick, great job adding the 20-second summary at the end. This is an improvement on your normal way of structuring scripts, not REALLY reaching a conclusion (because physics doesn't generally allow for cleanly-delimited conclusions, and I like that you don't pretend that it does), just reaching the end of what you're going to explain, and then going straight into "So, what do you think..." . The summary wrap-up statement wouldn't be nearly as necessary if you were just doing the regular surface-level explanations that most other science channels do, but since you're ACTUALLY trying to get people to develop new heuristics in most of your videos, and not just put a check in a box for "well, yep, I did a video about that", the summary is a great way to put a bow on things.

@tonedeafcolorblind7187

2 жыл бұрын

So is programming "codes" with words gestures colors and 5 Gee

Between Science Asylum, PBS spacetime and Fermilab, I've learned more than I ever did in school, but most of my teachers would have taught like this if they weren't constrained by the school rules and curriculum and they sometimes did when they could. So i'm hoping these channels are around when my kids grow up so I can show them. Great channel, keep up the great work, Nick.

@ScienceAsylum

4 жыл бұрын

The "constrained by school rules" comment is too accurate.

@regular-joe

4 жыл бұрын

I'm a teacher, and I'm always so grateful to hear that someone from outside the profession understands that there are chains that the system shackles us with that are stronger than we are, no matter how hard we fight - and please believe, we never stop fighting for our students!

@maythesciencebewithyou

3 жыл бұрын

You can only teach so much at school. If you want to learn literally everyhing there is or more than that go in depth to understand the stuff and not just learn "facts" and simple concepts, you can do that in your free time or go to University and learn the subject that interests you. Even at University you eventually specialize in something after learning some general foundation. And let me tell you, even most university students bitch about why they have to learn stuff that they'll never use. Many students bitch why they have to take Math, when all they want to do later is e.g. become a biologist. Don't pretend like you want to learn everyhing. You might be interested in science, but others are not. You might like to learn more about atoms, while others would rather learn more about fashion. The goal of school is to give you a foundation to expand on, that allows you to learn for yourself. If you are more interested in something and want to go more in depth, that what University is for. Be honest, if the school would not force you to take certain subjects, you wouldn't bother learning about them. You might that stuff, but it is part of a general education. Others hate it that they have to take science classes. You have no clue how much stuff there is that you could learn. Most students are already sick of the stuff that is taught in school. You can't expect school to teach you everything, nor would you want school to teach you everything. Be honest, most of the stuff you'd find boring. And even if you didn't find something boring, you might be overwhelmed by it. If you think school doesn't teach you alot and it is too easy, you can just jump classes any time you want. Get your highschool diploma at age 14 or younger and move on to college.

@MrHkl8324

2 жыл бұрын

@@maythesciencebewithyou No, every university force you to learn so leftist ideology, like gender studies 101. While what you said may be right 20 years ago. IT is not like that even in BASIC bachelor degree course, after all.

@asperRader

2 жыл бұрын

@@MrHkl8324 this man has never stepped foot in a university

Thank you thank you! I had no idea and now I completely understand! Those color graphs as well as your explanation of the black body curve make total sense and have inspired me to learn more! Your channel rocks! I think I hit thums up more times on your channel than anything else I watch on KZread!

I absolutely love this upload. Thank you for doing this. The shirt was the perfect touch to the content.

You are seriously one of the absolute best science teachers I've seen. Please don't stop doing what you're doing.

Puting the EM spectrum into scale blew my mind.

@tawkinhedz

3 жыл бұрын

I thought I understood that but obviously did not

You do these brilliantly

Wow, I've never thought about this question before but the answer is simply beautiful. Thanks for the video!

This channel, Stated Clearly, and 3blue1brown are my favorite STEM channels

@ScienceAsylum

4 жыл бұрын

That's a great list to be included on 😊

@Blox117

4 жыл бұрын

try technology connections, he made a similar video on the 'color' brown

@man-with-a-plan

4 жыл бұрын

Mine too

@tawkinhedz

3 жыл бұрын

3 blue 1 brown is high level. I like arvin ash and learn engineering as well. Anything brilliant sponsors!

I love the questions you can come up with. I have never thought about why there are no green stars :)

I’ve never learned so much in 9 minutes before. I’m in love with this channel

This just filled some major gaps I had in understanding colour perception. Totally fascinating

Eyes closed, hands shaking, it's "anyway" time. When that happens you know something awesome's about to be learnt.

Something I never really thought about before, but now I know. And knowing is half the battle.

@rillloudmother

4 жыл бұрын

yeah but what's the other half..?

@monad_tcp

4 жыл бұрын

@@rillloudmother Cold Fusion !

@rillloudmother

4 жыл бұрын

@@monad_tcp for real? I got (bs&t^-r) /n...

@robertfleischmann4119

4 жыл бұрын

Half of knowing is the battle!

Nick you are simply the best. I have heard and read dozens of explanations on the subject but never so clear, precise and complete. At the end of the lesson can only say: of course it is! Thank you Big Crazy

subbed...this is an awesome channel...it answers all my questions after studying black body radiation...

Whoa, this is a real red letter day for me - I understood this one on the first viewing! Thanks for continuing to enlighten me, Nick!

There’s a lot of things that blow my mind, but this really blew my mind. I love light and color science, it’s a much deeper rabbit hole than I ever expected. I need more!

@turbotard

2 жыл бұрын

Pink stars... super Mario shit

You use one of the best teaching techniques I've ever seen...props to you!💪

This was one of the most brilliant videos I have ever watched I totally understood this fascinating topic thank you

@ScienceAsylum

4 жыл бұрын

You're welcome 😊

Magnificent video Nick. You are constantly wanting to explain every single detail of every physical phenomena to make it less abstract and accessible for many people. And this is rare in education, thats why i admire your work A LOT

Another great video Explaining complex concepts in simple terms like no one can

Good channel. Explains things in clear, and amusing ways, that nearly everyone can understand and keep their attention.

Great explanation. perfect visuals good job bud.

thank you for bandaging my brain with the missing info.

@ScienceAsylum

4 жыл бұрын

You're welcome 😊

Because Green and Purple are not creative colors

@feynstein1004

4 жыл бұрын

Oh no 😂

@duckymomo7935

4 жыл бұрын

I completely forgot about that lol

@zanderoneil3405

4 жыл бұрын

Shut. We don't talk about that.

@Lucky10279

3 жыл бұрын

I wonder how many people got that joke.

@watertommyz

3 жыл бұрын

@@Lucky10279 let's never get creative again.

Nick! you are the coolest person ever. such great content and delivery. You are my school!

You deserve 4M!! Subscribers literally.your work is worth of Saluting

Did anyone else realize that the white star had the Science Asylum icon on it? You can see it if you look at the screen from the side.

Wow, now I know where the temperature color of the light bulbs comes from. That's why I love 6000K bulbs. They are white and not yellow like the 3000K ones.

@ScienceAsylum

4 жыл бұрын

Yep!

@tawkinhedz

3 жыл бұрын

God i love this channel

Pretty neat explanation of what happens with the mixture of colored light. I set up and executed professional outdoor aerial pyrotechnics displays for 20 years and during a finale, if I sent many multicolor shells, the resulting effect in the sky would be clusters of white with colors at the edges. I never knew what to call it but would say the colors wash out to white.

I don't know why you have less views and subscribers than other educational channels. Your videos are really awesome.

I think it would be neat to see purple and green stars. I made some in Photoshop a few years back. They're a bit crude, but, kinda cool to look at. This was also done under the assumption that stars came in every color at the time.

Your presentation is incredible. I have known everything you explained. But I have never known anything about it LIKE THAT.

Good stuff, thanks. Well explained

@ScienceAsylum

4 жыл бұрын

You're welcome 😊

Dude this information is awesome!

Mr Lucid: "What did you expect?" Mr Einstein: "I have deep faith that the principle of the universe will be beautiful and simple." Mr Lucid: "The universe to be simple!? Pff!" :D

@benjaminbuchan6497

4 жыл бұрын

Emergent behavior is awesome and/or headache inducing. The basic principles don't have to be complicated for the universe to be an incomprehensible mess.

@vertexrikers

4 жыл бұрын

​@@benjaminbuchan6497 I just ignored the fact that those quotes refer to different things, hehe. It's more fun to be a lunatic sometimes =)

@ecdetrick4560

4 жыл бұрын

a complex universe based on several simple rules!

@vertexrikers

4 жыл бұрын

Y'all seem to have sold your humor to afford the tuition fee? :P

@ecdetrick4560

4 жыл бұрын

vertex rikers I love science jokes lol

@Science Asylum Thank you for doing a video including color theory. It's one of my favorite things! Also, thank you for saying the sun is white. As a color science enthusiast, it's infuriating hearing people claim the sun is yellow. It's only yellow when it's very low in the sky.

Great! As always!

Thanks. You just made colour interesting. Off to learn more about the wavelengths outside our visual perception.

I can't believe two hours ago i was wondering, why no new video has come for so long and here you are😊

Brilliant as always ❤️

This was really neat :) I learned something new today !

Love this video. I never new why we couldn't see purple or green. Thanks.

"your RBG screen is faking it" OMG. My life (lived entirely in front of my computer screen) IS A LIE

@monad_tcp

4 жыл бұрын

if it would be a difference seeing 0.00000001% more of the light spectrum. I want better eye ! put more rods in that crap bit

@DANGJOS

4 жыл бұрын

@Matthew H Yep, especially cyan. On older screens, cyan looks like light blue. Real cyan is much richer than that! It looks like a beautiful mix of blue and green. It's unfortunate that we're robbed of such a gorgeous color by our inadequate screens.

@XtreeM_FaiL

4 жыл бұрын

Matthew H Don't try to say that you did not see it.

@ewthmatth

4 жыл бұрын

@@DANGJOS so what newer screens show good cyan? A specific type of display?

@DANGJOS

4 жыл бұрын

@@ewthmatth Look up screens with a wide color gamut. What kind of phone do you have? Newer phones are starting to have wider gamuts. My phone, for example, shows cyan much better than my old phone, but it's still not as good as real spectral cyan.

"stars dont get anywhere near infinite surface temperature" is gold

Pretty interesting! Thanks for uploading.

@ScienceAsylum

4 жыл бұрын

Glad you enjoyed it 😊

I didn't ask this question but I'm glad someone answered it

I haven't seen a video like this on KZread. Thanks for the very clear and will presented explanation! I always wondered about this exact question. I just never really looked into it! Glad to know now :) Edit: why was I not already subscribed? Gonna be binging your videos soon haha

0:46 That's one *cool* star

Dang, wasn't expecting to learn so much more about visible color from a video about stars, great vid! :3

@ScienceAsylum

4 жыл бұрын

Thanks! 😊

Loving your use of personality extras.

Today I learned that to be purple a star has to be infinitely hot and that our sun could actually be emitting more green than any other color?

@thomasraahauge5231

4 жыл бұрын

@Just Looking Don't you mess with the artist formerly known as Prince! 🟣🟣🟣🟣🟣🟣😁😁😁😁😁😁

Simple, fun and instructive, well done! I once experienced seeing the sun turning green at the very last moments of the sunset, the so called "green flash".

Great summary.......hadn’t focused on this specific topic since taking undergrad astronomy courses over 30 years ago.

thank you so much for this!

Crazy. I literally just asked this very question in my head when telling my kids about star colors this week. Thanks for reading my mind. 😁

@ScienceAsylum

4 жыл бұрын

Glad I could help 😊

How can 2 event horizons with infinite time dilation orbit each other and merge dammit!!!

@jan861

4 жыл бұрын

That's an unrelated question, but I comment in order to receive a notification for the answer.

@Senekha86

4 жыл бұрын

Im no expert but I think youre looking from the wrong perspective. In our Time scale the two objects are still moving. And as such they can do all the stuff they want to. Like spinning, deforming, and merging. (Seriously with the infinite time dilatation thing they couldnt even do that properly, because they move to the middle of the black hole faster than the speed of light. This just dont work - as far as we know.) In the end its a singularity and we dont know whats physically inside a black hole. All the space and time switchting inside a black hole is just because our mathematics from outside a black hole say so. We dont know if there are other factors for the formulas and how they look like.

@LuisAldamiz

4 жыл бұрын

The same reason a photon, which experiences no "subjective" time nor space at all (infinite time dilation as well), interacts with electrons and such, including our eyes, in less dilated space-time? I don't understand how exactly either but I think I understand it is much more common and general than black holes only.

@linksfood

4 жыл бұрын

Because the event horizon is just a bounds. It's vaguely true that within a black hole you'd experience no time, but that's a different situation than the bounds of the black hole. From within, you would never experience the collision because the collision never reaches you. The collision DOES reach the bounds, though, which is the event horizon. If you were in the black hole, you'd experience the collision after an infinite amount of time, but that's only true from within. Einstein said that there's no preferential reference frame, so it's all about what the observer sees.

@cocoscacao6102

4 жыл бұрын

@@linksfood The thing is, from our perspective, nothing ever crosses event horizon in the first place. That's why it's called an event horizon. Those events never take place in... uhm... our universe. I'm no expert (far from it), but if that's the case, how the two bounds of never happening stuff can even merge? How can it suck matter (or energy, and yes, I'm aware it doesn't suck really) if that matter (or energy) never enters the black hole from our point of view. Instead of my pathetic rumbling, better check this video kzread.info/dash/bejne/qIKVp6SbdsXck7w.html But a video on the topic would be a blast.

Simply awesome 😎. When I was a child my mind was full of questions something you describe in the videos. ❤️❤️❤️

That was an entertaining and succinct explanation. Thank you for that.

Thanks for your great videos! It's very much appreciated. Brown (misnomer) dwarfs would look violet and purple (among other colors), depending on the chemistry that takes place on them. Even though, they technically aren't Stars per-say. These large bodies were named before we had actual images of them (or information about them). Our understanding has vastly improved since naming them (the name stuck).

Thank you, but a few nitpicks: 1) It is the photosphere of a star that emits visible light, not its chromosphere. 2) The Sun's blackbody curve peaks in the blue-green part of the spectrum. But because of the shape of the blackbody curve, with its long slope on the right (red) side, the Sun still emits about equal amounts of red and blue light even though its blackbody curve peaks in the blue-green part of the spectrum. Like you said, equal amounts of red and blue light (and yellow and green) equals white light. Thank you for stating clearly that the Sun is white!!!

@royalecrafts6252

2 жыл бұрын

Will a gamma ray burst be slighlty violet? Since it has a ton more gamma radiation than reddish one?

Best explanation ever... a ton of stories to be written about why what cannot exist does (or appears to) in some science fiction story....

I almost understood everything you said this time. Thank you for these glimpses into our amazing universe!

Oh yea I love this episode. I have been really intrigued by colours lately. I spent some time at university doing some computational neuroscience and neural information processing type of classes, and that gives a good insight of how stuff like neural population coding works in the case of color vision. I loved so much your animations of how 3 neurons can encode a colour and then how that connects with the chromaticity colorspace (being the upper border of it) they helped me better understand a concept that without those type of animations can be harder to grasp! I just wished you went more into details for some topics ahaha i Just liked it so much.. for example why can a TV only represent colours withing a certain sub triangle of the colour space? Is it because we chose as primary colour three that are on the angles of those triangles so it is unable to mix them to form something outside of those boundaries? If so.. couldn't we just use different primary colours to represent more visible colours?

@thomasraahauge5231

4 жыл бұрын

Industrial standarts still dictates the manifactoral choices. The quest for a close-to-nature colour rendition for cinematic purposes was a long and arduous struggle, riddled with mind-numbingly expensive blunders and technological dead ends. Cinematic projectors work by sending (as) white (as possible) white light through the film strip, which then absorbs some of the light and emit the rest of the light on the (as) white (as possible) screen. The proces of capturing natural colours chemically in negative, re-print them in positive, while severely restricted by available pigments is more mystery than science. When the industry finally cracked the code, no one really objected that the colour gamut wasn't perfect. It looked fancy and colourful, people loved it, and investors could finally cash in on their astronomical spending. TV sets - on the other hand - works by directly emitting light, and again, the colour gamut is restricted by available florescent compounds. There's only so many chemicals in the world to chose from, and since every added primary colour must have it's own carrier signal when broadcasting via electro-magnetic radiation ("air waves"), adding more colours to enhance the gamut is effectively cost prohibiting. The industry settled for a three colour based gamut, since this is the lowest number that can produce an acceptable gamut. There were bunches of trade-offs, most of them dictated by financial viability, but also some dictated by the limitations of practical engineering. Now we have flat screens, and LCD screens work in a similar form to the film strips: by absorbing varying amounts of different colours from (as) white (as possible) light. It would probably be manageable to manifactor LCD screens with any number of primary colours, allowing for a much wider gamut. But industrial standarts are extremely conservative, and the blue-green-red gamut is here to stay. Unless people start demanding a wider gamut. Industry is, after all, driven by profit, so if the market is there, the product will be there, too. As soon as someone manage to produce it at a viable cost, of course. In the meanwhile, the bulk of the consumers have grown accustomed to the relatively narrow gamut that is now standart. Sorry for the long post. Here's a hash tag: #potato

@axeguy3856

2 жыл бұрын

@@thomasraahauge5231 As long as the colour mix is consistent, the human brain will adapt to it. Our perception of colour involves many parts of the brain, including facets of memory and other experience. In low intensity light, you can still notice colour differences enough for your brain to normalize the visual situation. My point is that our experiences and visual signal processing will allow you to accommodate and tolerate the inaccuracies of the RGB screen. The downside of our visual processing tricks is that they can be fooled by optical illusions that target the way we process colour and patterns, etc.

You're a purple star in my heart 💜

Great video. Thanks

5:21 Not only he does the red corner pun which is quite funny, but he take it to the next level by avoiding to use the word "corner" for the 2nd attempt...

What if you had a cool star that had an extremely high amount of something like copper which emits light in a very specific wavelength? Would that shift the colour of the star far enough off the temperature curve to to visibly change its colour? Or would the blackbody radiation still be brighter than whatever emission lines the dominant element produced? Also, this would probably indicate that someone had artificially created a particularly heavy star for some reason (maybe they just wanted to try it out for a youtube video).

3:22 According to that graph, our brain never gets only signals from the green receptors. Now I wonder how the brain would interpret it if we could somehow either directly stimulate the "green" nerves or suppress the other two.

@DANGJOS

4 жыл бұрын

@Paul Paulson I'm not sure what you would see. Color works on an opponency process, and it isn't as simple as people think.

@frogz

4 жыл бұрын

got a green led/laser? try it yourself, view the world in monochromatic, add filters to eyes for bonus effect

@PaulPaulPaulson

4 жыл бұрын

@@frogz You mean looking directly into the laser to burn out the receptors for that color? I don't know if the damage of the laser is selective like that. If it is, it's still a very drastic measure. I'd prefer a non permanent suppression of receptors.

Not only are you a brilliant teacher and mentor, you're also very good at pausing between your sentences. When I watch other youtube channels, they squeeze everything they say into one very long nonstop sentence and give no pausing in between. This overwhelms my brain and thinking and I have to manually pause the video every so often. But you (among others) make a brief pause between your remarks and it allows my mind to absorb what I'm hearing. It makes good communication and your videos very enjoyable to watch, and I actually learn from them. With the others that don't make brief pauses, I get headaches and I never want to watch them again.

@ScienceAsylum

Жыл бұрын

*"They squeeze everything they say into one very long nonstop sentence and give no pausing in between."* To be fair, I did this too in my really early videos, but eventually realized that wasn't helpful.

@bobertblobert7812

Жыл бұрын

@@ScienceAsylum Thank you for your reply. Good to hear back from you and just so you know, I like your channel and subscribed!

Same is true for metal heating in blacksmithing. Though past white hot glow it often melts! You can catch more color in the metal at lower temps, but turquoise is as close to green as I have seen in temper colors.

"See a image of jiggling Copper" *laughs in portuguese*

And then there's the difference between RGB and CMYK and that there's no actual frequency associated with the magenta color as we perceive it.

@carultch

4 жыл бұрын

RGB means we identify the mix of additive light colors needed to generate the color in question. CMYK means we identify the mix of pigments, which are subtractive because pigments absorb color.

3:22 the more technical term is short, medium, and long receptors, the actual color is mixed later in ganglia and that’s where you get opponent processes wherein fatiguing the color blue makes you see more yellow.

very instructive !

10^24, the number of stars in the observable universe, is a big number ... but only slightly bigger than Avogardo's number at 6.02 x 10^23; I feel this serves as useful comparison number.

@ScienceAsylum

4 жыл бұрын

Sure, and the fact that's it's _bigger_ than Avogadro's number says a lot, I think.

@modolief

4 жыл бұрын

The Science Asylum Lol! 😀

Great video as always. I thought I'll just learn about stars, but ended up learning about visible spectrum, black body radiation and other cool stuffs. Superb video.

This video is gold!

You're such a great teacher!