Thanks! This video brought back memories from when I was an undergrad back in the mid '60's, working as a dust-rag boy in the physics department. A new 1.5 m spectrograph had just arrived and I got to set it up and do the initial calibration. After doing a number of sprectra of various elements, I set out to observe Fraunhofer lines. Problem was how to get sunlight into the small basement lab. I used five large WW2 surplus mirrors to reflect the light from the parking lot, down the hall, into the lab, etc., and onto the entrance slit of the spectrograph. It worked! Those were fun times and I was so fortunate to have to "work" for a part of my tuition!

@Polarcupcheck

2 жыл бұрын

Awesome story.

@skybot9998

2 жыл бұрын

What a great memory. What did you go on to do for a living?

@clarencegreen3071

2 жыл бұрын

@@skybot9998 Earned a PhD in solid state physics and then taught electronics at a small community (two-year, junior) college. Also wrote intro-level books in radio servicing (yes) and technical physics. I was born to be a teacher and I liked the small college environment. A good run!

@skybot9998

2 жыл бұрын

@@clarencegreen3071 nice! A friend of mine is helping me restore an antique am radio from the 1930's so yes physics and electronics great fun.

160 views? Scandalous, this deserves many more. A fascinating account

@Kathy_Loves_Physics

5 жыл бұрын

My computer says I have 1,300 views which is better than 160 but still, I can't help but think I would have millions of views if I just posted videos of my cat defecting... because... youtube

@johnpeter4184

2 жыл бұрын

15k views at two years. This instructor is a real treat.

@danielkaranja7978

2 жыл бұрын

@@Kathy_Loves_Physics The good thing is that your viewers have to listen and pay attention. So you have a more engaged viewership.

@curiash

2 жыл бұрын

@@johnpeter4184 video explodes.

@sanalkumars

2 жыл бұрын

@@Kathy_Loves_Physics Kathy, can’t agree more. These are such nice narratives and you should be proud👍

Fascinating to understand (as best I am able) how the timelines of light, electricity and matter exploration first proceeded in parallel and then came together in a heated rush (as the Pointer Sisters had it) to give us science as we understand it today. How these pioneers did what they did with no instrumentation, no mathematics and very little intuition (sadly so in the case of the brave Curies) as to the magnitude of what they were grappling with, defeats me. To me, it is iron cast, unwavering intellectualism, the purest application of brain power, that saw them through to the achievements we laud today. It's clear that right back in the beginning, Faraday was actually wrestling with the very basic concepts of energy and matter, struggling with puzzles that we only came to start to understand 200 years later. Amazing people. Thank you, Kathy, for your videos. As they say, nothing dies on social media and I think people will be watching your stuff for many years to come.

You go girl

@Kathy_Loves_Physics

5 жыл бұрын

Thanks.. I will. I checked out your KZread channel and I should say the same. Are you interested in doing a collaborative video about Quantum Mechanics? My email is in the description of this video if you are. Cheers, Kathy

I am amazed at how much work and research you have put into these videos. I like the way they string together to tell the complete history. You have so much enthusiasm, which makes them a joy to watch.

@MajSolo

Жыл бұрын

She is going through the entire history and these videos will be on KZread forever. Maybe that is the plan 😉

@jayronfinan

5 ай бұрын

Couldn’t agree more! What a gift to all of us. Thank you so much!

Thank you pretty much for all of your videos. I enjoy the way you simplify scientific advancements and making the science very clear and humanised even to the layman. Love from Palestine

@Kathy_Loves_Physics

2 жыл бұрын

I am so glad you liked them. Cheers from California

Kathy loves physics, we all love Kathy.

I did my master thesis in spectroscopy. I moved on later to other things but it has been a very good basis for many kinds of research.

What can be said in 1961worked in a lab using Bunsen burner in chemistry lab but never bothered who that name was. Today knowing that how and what he has developed has transformed entire cooking systems in every home and saving environment and eyes of ladies from the fuel wood smoke is how science benefits HUMANITY in UNKNOWN ways. Thanks for your study and comprehensive approach in the field of science in general and physics particularly.

Excellent work thanks

@Kathy_Loves_Physics

5 жыл бұрын

Glad you liked it.

Great video Kathy! I have worked with IR spectroscopy, gamma ray spectroscopy, alpha particle spectroscopy and positron spectroscopy! But the visible spectra are the most exciting and I remember doing these measurements in school and observing the double line of sodium. I even had a book from the Victorian age (which belonged to my father) with beautiful pull-out plates with the spectra of all the main elements. Someone threw it out during a clearing of our old house, probably worth money nowadays had I kept it safe...

@Kathy_Loves_Physics

2 жыл бұрын

Oh noo I’m sad about the loss of that great book now.

Chemist Here...Three types of spectroscopy revolutionized Organic Chemistry in the 1960's: IR and NMR spectroscopy and High resolution Mass Spectrometry, coupled with the new techniques of GL Chromatography, column chromatography, and other types of chromatography. Prior to that time, the limits of synthesis and analysis had been reached. The expense and time invested for the synthesis and characterization of any new compounds was not worth the investment. Now I could run a reaction, separate the products and determine the structures in one or two days rather than months.

Great work and presentation, thank you

I’ve just spent the better part of an afternoon binge watching you videos. I would just love to see someone do something similar for chemistry. It’s a pity we don’t have a John Read around to do it. His book “Humour and Humanism in Chemistry” (1947, G. Bell & Sons, London) takes a somewhat similar approach, dealing as much with the people involved as with the theory and practice, sometimes very funny. I have to thank you for an interesting and informative afternoon.

I have left Netflix for this, quite addictive. You tell great things in a simple format like a story. It sounds so easy- almost like the gymnasts showing their skills. These videos are sure to inspire a lot of people. Thank you.

What an amazing story....can you imagine their excitement in these discoveries?

Another awesome video. So rich with historical anecdotes that made the physics even more interesting and the scientists come alive. I have never felt so close to Bunsen, Plank and Kirchhoff before this video. Thanks very much Kathy for such a wonderful and inspiring work.

I can't seem to get enough of this channel.

Kathy, I love your enthusiasm, it's a delight to listen to you - and you know your stuff.

This video was so, so well done. I thoroughly enjoyed it. The fascinating information coupled with humorous anecdotes was so entertaining. Thank you!

@Kathy_Loves_Physics

3 жыл бұрын

Thank you for the lovely comment

@zes3813

2 жыл бұрын

wr

I worked in a government laboratory connected to a museum which eventually closed down. As equipment became obsolete it was put into storage and forgotten. When the museum was closed I had the job of recovering the collections and other items. This included the obsolete instruments, several of which were beautifully made ones from Victorian era instrument makers. This include an old spectrograph virtually identical to the Bunsen and Kirchkoff instrument shown in your video

Your videos debunking myths of the science field and also telling how everything started are so fascinating! If I had infinite time, I would just sit all day watching them until there was nothing left!

Thanks for this lecture Mrs. Kathy. You are wonderful.

@Kathy_Loves_Physics

4 жыл бұрын

aww thanks

I was a magnetic resonance spectroscopist at the local uni. Fascinating little corner of spectroscopy.

I LOVE this video and your energy so much! This is helping me in one of my Astronomy classes! Thank you!

I just came across your videos and I am really glad. Thank you for doing these. I will watch them all.

Thanks for filling in the blanks I had on this. History mixed with detail is a great understanding catalyst. Really love your work.

Kathy I'm so glad that I've discovered your channel. Thanks for all the great content.

I loved your video again Kathy. Thanks

I am a reasonably long time patreon supporter and yet I missed this. You are beyond amazing. Thannk you. raphael nyc

You have a wonderful way of connecting history to science. These stories are excellent!

The two Bunsen stories are great! The engagement and the burner!

I'm going to do an amateur spectroscopy course very soon, and I'm so excited and delighted to watch and rewatch this series, giving an overview of this field !! Thank you so much.

Wonderful! Loved this video! Thanks a lot.

Your videos are a gift to humanity. Thank you!

Fantastic video! One of the best youtube channels.

@Kathy_Loves_Physics

2 жыл бұрын

Thank you

Kathy....you tricked me ! Using Bunsen burners in high school...who knew? I thought your videos would only be collected anecdotes of scientists past.....YES ...AND....you're teaching STEM at the same time....you are wonderful ! Thanks

This is excellent history. There are so many other spectrographic-like phenomena that are used in science: NMR, various chromatography methods, Mossbauer spectroscopy, etc. that perhaps should be pointed out, that this was just the start.

Thank you so much for the video. My mind was blown away after knowing that each element have their own "optical fingerprint". And with this, we are able to learn abit more about the Sun. Amazing. I always thought life was boring, but turns out, i was soo wrong. Its been a long time since i was this excited. Thank you again. You saved me.

What a gem! Loved this video and the story behind it! Thank you.

I love science facts that put abstract ideas into perspective, like: Sixty billion of one percent of the sun is gold; Yet, the sun is "so immense " that 60th billionth of one percent of the sun is approximately equal to all the water in the ocean. (Wow, what a piece of information - which helps, at least for me, to put the sun's size into some realization!)

Inspiring video!! Loved the well written story and excitement in the presentation!!

@Kathy_Loves_Physics

5 жыл бұрын

So glad you liked it.

This was excellent! Thank you so much 🙏

Well presented and I absolutely enjoyed your enthusiasm on this topic, it made the video much more enjoyable to watch. Keep up the good work.

@Kathy_Loves_Physics

5 жыл бұрын

So glad you liked it.

Again, a fantastic expose of important scientific history. Brilliant!

Love your channel I’m 65 and reminds why I love science

Spectrometry is very important for my trade as an agronomist, for all nutrient levels in soil and leaf analyses are determined by spectroscopy. Thanks to Mr Bunsen and Mr K.

As usual, not long enough! Great stuff.

@Kathy_Loves_Physics

5 жыл бұрын

Jack, you are the only person who tells me that I don't talk enough! :)

@jafinch78

5 жыл бұрын

@@Kathy_Loves_Physics You don't talk enough. :D

@Kathy_Loves_Physics

5 жыл бұрын

By the way, Jack, you are a patron so there is another whole video for you to watch if you want it.

@Kathy_Loves_Physics

5 жыл бұрын

@@jafinch78 ha! Now you will never get me to shut up.

@jafinch78

5 жыл бұрын

@@Kathy_Loves_Physics Preach it! Profess that gospel of Physics! :-)

Just watched this one whilst on holiday in Edinburgh-fascinating and educational as ever-amazing channel. Kathy, you are fabulous- funny, idiosyncratic in that intellectual and fun way… I look forward to watching the whole series and recommend this channel to anyone with an interest in physics and the personalities behind its development.

@supermikeb

Жыл бұрын

Her book came out 10/12.

another great one. Thank you Kathy.

Why is it so late for me to find your channel? I do enjoy your videos all day. Keep up the good work.

@Kathy_Loves_Physics

2 жыл бұрын

Thanks

WOW, your videos are FANTASTIC.

@Kathy_Loves_Physics

2 жыл бұрын

Thanks 😊

Great video! You have the best intro music =)

Ok, You win! I've watched a few of your videos and found them very interesting. You are truly a modern James Burke (Connections). I've been a science fanboy all my life and having heard many lectures on spectroscopy, I avoided watching this one because I thought I had this s**t down. Boy was I wrong. I present you with the highest honor I can possibly give (and I'm pretty stingy with these in general)... Liked & Subscribed!!

Hi Kathy, even though I‘m interest in physics since school, your videos are still inspiring and full of new details. Thanks 🙏🏻 BTW, I lived the last 25J in Heidelberg, the main city of this episode.

@Kathy_Loves_Physics

2 жыл бұрын

So glad.

Excellent video. Thank You.

So good I had to watch it twice and I know most of the information involved already. But it did make me take a step back and think about how Johnson-Nyquist noise is directly related to radiation of a blackbody, which is something that I never thought about before. Thanks as always, I love your videos.

@Kathy_Loves_Physics

5 жыл бұрын

Count Dracula so glad u liked it. Now *I* have to look up Johnson-Nyquist noise.

@itsevilbert

5 жыл бұрын

@@Kathy_Loves_Physics It is also related to as Noise temperature. Useful electronic circuits all have resistors in them and the higher the temperature the higher the noise produced by the resistors in the circuit. In most analogue circuits the level of the noise generated by this effect is so small, as to be negligible, but for extremely low signal levels like those seen by amateur radio operators or astronomical radio telescopes it become a limiting factor for the distance from which a signal can be received. And it is one of the reasons why antennas are made bigger and bigger when looking at weaker and weaker signals or when looking at signals that occupy a larger range of the RF spectrum (AKA more bandwidth). Another solution is to cryogenically cool the first few amplifiers stages in a circuit. (e.g. the 70 meter dishes used to receive signals from the voyager space probes, would use a cryogenic ultra-low-noise amplifier for the first stage or first few stages of amplification until the signal level is raised well above the normal room temperature noise floor).

@donaldaxel

2 жыл бұрын

@@itsevilbert :: Why not change your name? ☻But even if I balk at believing anything said by a "Count Dracula" I must say that the description of how to do radio-communication with Voyager is answering many questions I have had regarding those (and other) inter-solar system communications.

great video! I love your channel

Wonderful explanation!!

Really interesting, as usual. Thanks

Very well explained, Thank you very much!

@Kathy_Loves_Physics

4 жыл бұрын

You are welcome!

Kathy is electrifying! 😂❤🎉

You make a great video, thanks!

Hi again! I love hearing trivial tidbits that never made it into my normal education about these people and their subject matters. I don't think I ever knew about AGB's deaf wife, and I never knew about how Bunsen was tragically absent-minded. I like hearing about how the people and the discoveries they were making were influencing others outside of their own fields. I read a long time ago in (I think) an ASME publication (mid 80s to mid 90s?) about how it was largely due to mechanical engineering design advances that hard drives became smaller and faster.

Lot of interesting information. Really enjoyed this.

@Kathy_Loves_Physics

5 жыл бұрын

So glad you liked it. Like I said, it is one of my favorite stories. I think because the equipment was so crude but it did actually change the world.

Wow, just so amazing the narrative to bring the equations alive…

Awesome series!

This is a very essential step of Science towards quantum mechanics.

Kathy ... you're doing an important job and I enjoy your videos ... sometimes I get lost in the more complicated explanation

I'm addicted to this channel!

Amazing, nicely told! Storytelling makes dry theory come to full life. Lovely!

@Kathy_Loves_Physics

Жыл бұрын

Glad you enjoyed it!

@Astronomynatureandmusic

Жыл бұрын

@@Kathy_Loves_Physics I'm currently researching the idea 'in ancient times, how big did the people think the universe was' and your other videos do a great job in helping me around that subject!

Great video as always. Contains a minor error. You say gas around the sun absorbs more radiation than it emits. That is not so. It absorbs the same as it emits but the relevant radiation it absorbs is traveling towards us so in one direction, but it emits it in all directions, hence the black lines.

@Kathy_Loves_Physics

2 жыл бұрын

Ohh that makes perfect sense! Thank you for explaining it to me.

This is a good introduction to a topic still not correctly dealt with in current astronomical literature. Especially when considering the shapes of fast rotating stars. We get splits in spectral lines from electric fields and magnetic fields. We get Doppler shifts in spectral lines with everything from a star orbiting a companion, to a star growing and shrinking (radial velocity pulsations). Then a smearing of lines, due to everything from rotation, to updrafts and downdrafts, etc. Yet, it’s amazing how much we assume we can get from looking at the spectral lines of a distant object like a star. For example, we know that the sun is amazingly spherical, and not flattened as much as we think it should be by its rotation. Yet when we view a distant star, and get that it is “flattened into an oblate spheroid”, we get that mostly from the spectral lines, and not that we can visually observe how flattened the star is. You see the mess of assumptions already here. Also interesting, is if you look at the work on radial velocity oscillations of K giants, you see that they are finding these apparent radial velocity changes are not due to a star orbiting a companion, but perhaps intrinsic to the star. So why is that? That’s something to work out first maybe, before we say with confidence everything else we think we get from this data. I’ll go out on a limb, and predict that just as the sun is more spheroidal than it should be, given it’s rotation, so are especially the hot blue stars we see “nearly flattened” by rotation. It’s important to know just how many things affect the spectral lines, before we go to mapping out star shapes with just that information.

Excellent video!

Thanks for referring to this from your "Max Planck Quantum Theory" - KZread video. I knew about spectral lines in general, but haven't used it since HighSchool, and maybe never knew that Hydrogen lines were black in the sun-light spectrum; this presentation is clearing things up. I still have to go back to the Planck and Kirchhoff video, of course.

@donaldaxel

2 жыл бұрын

And luckily I can stop watching, thinking, thinking more, reading the planches, go back, spool back, and listen again. :) ❤

This was great. I learned!

I really like your videos. I have a suggestion: it would be helpful if you would put the number you assign to your videos in the youtube title. I get your videos from youtube's recommendations, and you often mentions previous videos and subsequent videos, but it's hard to find them on you youtube channel and would be much easier if the video number you give each video was in the youtube title.

I really like your videos. How about a video about AT&T's sound-wave theories which led to the creation of the Orthophonic Victrola?

Kathy, you are the Bomb. Thank you for your generosity. I found it very hard to pause the Video, even with Natures persistent and then urgent call.

This was grate, as in optical grating! The role of photographic film deserves mention as does a company called Jarrell-Ash which brought much of this to the Americas. Nice presentation.

once again great video!!!

@Kathy_Loves_Physics

5 жыл бұрын

Zviki Segal thanks (again)

BEAUTIFUL THANKS!

These presentations are excellent! Only 20,000 people interested ? Not possible.

@Kathy_Loves_Physics

2 жыл бұрын

Thanks!

When she said about Kirchhoff "That we butcher his name" I burst out laughing because I too do that I pronounce him kir-cha-cough

@Kathy_Loves_Physics

2 жыл бұрын

Oh goodness, I mispronounce so many names which is a problem considering my job.

So Bunsen was the original Richard Feynman like Cool Dude scientist? Also, his ethics about openness in knowledge is a beacon of salvation.

@Kathy_Loves_Physics

3 жыл бұрын

Except that Feynman was a very cool dude and Bunsen with a ridiculously spacey and dorky dude which is what I love about him. Like, he would show up to a party on the wrong day and everyone would love him so much that they would just re-invite people to the party and pretend that he didn’t get it wrong. Honestly, Robert Benson is one of my favorite scientist of all time.

I'm sad knowing this series is coming to an end. How many minutes IS this whole thing? I'm a better person because of it.

@Kathy_Loves_Physics

4 жыл бұрын

Wow that is a lovely comment. I think I have made like 10 hours of video! (I have about 12 that are not directly in the electricity timeline BTW so you have a few more videos then you thought you did)

always great！ thanks！

@Kathy_Loves_Physics

5 жыл бұрын

huang chao aw shucks thanks

this is crucial info on the origins of spectroscopy and black body radiation

Thank you for your excellent videos. The history shows us the abolished alternatives on the way to a right guess, and it makes the scientific process alive. Otherwise you have somehow to believe in the chosen established model, the long work of searching is essential. Is there a parallel attempt to show the development of mathematical physics in the like manner (for example for Oliver Heaviside and his vector calculus, that you mentioned)? It would be revealing. Could you try it? Thank you.

That's a pretty good presentation, but unless you were unclear, you've misrepresented Bunsen and Kirchoff's spectroscope. Fraunhofer did use a moveable arm to adjust the wavelength being observed.

Thank you very much for this historical science videos... You are filling in very unfortunate gap in this domain.

Bunsen, sounds like, if he was alive today...he would be some college or university's beloved professor somewhere within their science department...and I would love to have the privilege of taking his courses.

at 8:00, you talk about the concentration of gold in the sun's atmosphere . My question : is the spectrum alone enough to determine the relative abundance of elements in the sun? If not, how is it determined? Thanks for another great video

Your channel is such a blessing. I was just thinking and hoping to find a trustworthy physics resource for self-education and teaching. Thank you for your love for God’s world and for the historical sources in these papers!

Fascinating subject

So great!

My favourite episode.

Your videos rock!

You are just the best..🙏🙏🙏

Interesting as always! The emission spectra of the elements periodic table is neat! I was OK with the spelling of Kirchhoff, but the debate was whether to pronounce the 'h'. Sounds like not.

@Kathy_Loves_Physics

2 жыл бұрын

Oh I would never trust my pronunciation ability. Never. I’m actually trying but I’ve been told repeatedly that I am getting it wrong almost every time.