Hi everyone, if you're new to my channel my name is Ben. I read all of your comments and reply to as many as I can. While you're here you may be interested in some of my other videos, like this one where I re-invent a lost supermaterial 'Starlite': kzread.info/dash/bejne/k6WGlsGOn6Wvqrw.html Or maybe this video where I speak with a retired aerospace engineer that has turned his expertise toward making incredible backyard rollercoasters: kzread.info/dash/bejne/haemyKSxh7zef7Q.html How about running a gasoline engine on firewood? I've got a video on that too: kzread.info/dash/bejne/Z2ZmpMOxfZOwns4.html Thanks for stopping by! Leave me some comments. I'd love to hear from you.

@grantmccollum4499

4 жыл бұрын

NightHawkInLight The interaction with your subscribers is appreciated. A lot of channels don’t do that.

@strangeke7750

4 жыл бұрын

How is this not a close proximity spy drone. Basically invisible.

@yonkromis7883

4 жыл бұрын

Question about solar light will they focus the Sun's light in a hard sharp straight line as opposed to a round circle I'd appreciate if you could check that out and tell me

@yonkromis7883

4 жыл бұрын

I don't see the link on where to buy them

@zac3392

4 жыл бұрын

NightHawkInLight Just found u, love ur videos... reminds me of Smarter Every Day

Can it hide all my problems in life?

@spaghettiandmeatballs6471

4 жыл бұрын

Depends on the orientation of the lens.

@lucasklinkhamer4802

4 жыл бұрын

Yes.

@heavens.sorrow

4 жыл бұрын

If you bury them deep enough you can hide them in anything.

@SuiYo

4 жыл бұрын

Hey I just watched your most recent video, and the one you made with William Osman, good shit

@lucasklinkhamer4802

4 жыл бұрын

@@SuiYo I was about to say that too 😂

My shower door's been doing pretty much the same for 30+ years

@kr00m

4 жыл бұрын

niiiiice

@devinnoordenbos1922

4 жыл бұрын

2_Face Unknown don’t you mean vertical?

@jamesamores9611

4 жыл бұрын

@@kr00m 4

@dofehino5444

4 жыл бұрын

@@devinnoordenbos1922 horizontal is for a good impression

@rinaldykase

4 жыл бұрын

@@2FaceTube damn you, i can't stop laughing

“He’s using invisible technology, we can’t find him” Tilts head 90 degrees Ah there he is

@mensch.meier.8816

4 жыл бұрын

Can you hide NWO MERKEL and co?

@nonchip

4 жыл бұрын

nah you'd have to tilt the hidden person ;)

@theeloquenteccentric8321

4 жыл бұрын

Sorry but logically that won't make a difference. Its only if you tilt the shield that you will see the optically hidden object. Still a funny comment though.

@theeloquenteccentric8321

4 жыл бұрын

@@joebidenofficialpotus Well, then it the illusion is defused, I guess. But I don't think the military would make a shield so confusing for the wielder though. There is almost always only one comfortable way to wield something. Say, you don't point a gun at yourself or hold it upside down. Not only that, but it will probably be in the shape of a rectangle to hide the entire body; not a square or a circle. As such, it will be almost always necessary to hold it vertically to feel stable. In any case, that would be hilarious all the same.

@nonchip

4 жыл бұрын

@@theeloquenteccentric8321 i mean they do have "this end towards enemy" stickers, pretty sure they'll figure out shields :D

invisibility has already been invented, we just can't see it

@liljay8750

4 жыл бұрын

Agree

@richard_JT

4 жыл бұрын

Witty

@pratomoardianto336

4 жыл бұрын

🤣

@Rosye13106

4 жыл бұрын

😂

@nadamastodo9499

4 жыл бұрын

Is magic ✌️👍✌️

Soldier: They cant see me, Im a blur Enemies: Sir! there's a huge ass Blur square moving from left to right.

@d.t.w1390

4 жыл бұрын

Captain: that probably one of our dead soldier spirit

@ryukikenshi5357

4 жыл бұрын

enemies mayor: naaay..its just your gay mind talking

@benjiebear6513

4 жыл бұрын

Just let it go, it's only enemies who use the invisible shield!

@Mathsuricate

4 жыл бұрын

kkkkkkkkkkkk

@bababooey5703

4 жыл бұрын

He's in passive mode

This just proves my theory that magic users in the past were just highly scientific people who figured out how to use the elements to their advantage

@ephraimcullen

4 жыл бұрын

That's why they say. "Magic is just technology we don't understand"

@FJTHEGOON

4 жыл бұрын

Justin stop it please

@mutantkoffee

4 жыл бұрын

Bro theres no such theory, and nothing new, search for some books, die hard magic its almost pure maths.

@RCGrid

4 жыл бұрын

Justin Y. I’m sure you were the only one with this theory

@navidmehdi6

4 жыл бұрын

just watch an anime called Dr Stone.

This dude looks 40 and 12 years old at the same time.

@snarfsnarfff

4 жыл бұрын

Your sentence reminded me of Tool, 46 and 2.

@ikeyshuster9801

4 жыл бұрын

Best thing I've ever heard lol

@poncetorres7110

4 жыл бұрын

😅👍🏻.

@salg.5153

4 жыл бұрын

He reminds me of a villain on Bonanza or some random western sitcom.😂😂😂

@pablotapia2346

4 жыл бұрын

😂🤣😂

So I decided to check out some of your older videos, and surprised to see that you’ve been making such great content for longer than 10 years. I think it’s incredible that still today you’re continuing to find inspiration for random (but interesting) things so frequently!

I figured there was a reason there always seemed to be some sort of parallel lines in the background of those clips

@ClokworkGremlin

4 жыл бұрын

Oh, that part was pretty obvious, the guy is fairly open about his "invisibility cloak" being a fresnel type lens and even includes some cross-sectional diagrams. What I *didn't* know was that they've been available for years. Which means he can't exactly be patenting it.

@altersami9660

4 жыл бұрын

@@ClokworkGremlin *laughs in US patent office* He most likely could. Solely based on the concept of using it for military/police use cases. But having the patent hold in a court case, that's a different story. Just because you get something patent, doesn't mean it's valid, both in the practical or legal sense.

@Nostalgicinquisitor

4 жыл бұрын

Bending the light !

@muntee33

4 жыл бұрын

Nostalgic inquisitor refracting

Excellent as always. I could see a couple arguing, then one holds up a sheet and says, "Great, now I don't have to look at you!". 😂

I have a few of these invisibility cards. It’s so cool to play with them and see with what items and in which situations they work the best

This lens used in toys too changing characters or image based on where you look or angle.

@xenontesla122

4 жыл бұрын

ibrahim s Yeah. They’re called lenticular lenses when used in 3D images: en.m.wikipedia.org/wiki/Lenticular_printing

@brapamaldi7666

4 жыл бұрын

surprised this wasnt mentioned as this is how i remember these lenses being used for almost 40 years, lol

@90nobelscientistsbelievein97

4 жыл бұрын

Can you please spell it for me what are those lens called?

@CineSoar

4 жыл бұрын

@Michael kilby You're going to have to back that up, since the patent for Lubor's lens trick specifies "providing a lenticular screen having a series of parallel lenticules".

@CineSoar

4 жыл бұрын

@Michael kilby You made the claim that the Lubor's lens is "completely different" than a lenticular lens, that it "operates on more dimensions" and "bares no comparison". I've cited the original patent application, which describes a parallel lenticular lens array. Now, you say "it would be easy to rebuttal [sic] the citations" and yet, here we are... no citations, no links to drawings, or credible descriptions of just how the lubor's lens differs 'completely' from a lenticular lens. That is what I meant, when I said, "You're going to have to back that up".

This might sound stupid but in my head it works like the smudge tool on Photoshop when im trying to delete something from the image

@kirkc9643

4 жыл бұрын

This is the analog version

@dantheman2907

4 жыл бұрын

Not very well?

@JNCressey

4 жыл бұрын

Step 1: resize to 1x1080 Step 2: resisze back to 1920x1080

@azz2

4 жыл бұрын

Pretty good analogy. Essentially it is smearing everything horizontally. A good demonstration would be to have a wet painting with horizontal details and then wipe over it. All the original colour is there but only the horizontal details can be made out.

When a grid's misaligned with another behind, that's a Moiré!

@degenerategrappling6503

4 жыл бұрын

Well done

@MrBatbuddy

4 жыл бұрын

LOL, That was Great!

@RobertoOrtis

4 жыл бұрын

Don't get it

@azyfloof

4 жыл бұрын

When the angle's just right and the spacing is tight, that's a Moiré!

@mrkiky

4 жыл бұрын

@@RobertoOrtis It's a reference to Dean Martin's song "That's Amore"

Fascinating! Thank you for the explanations!

@sedevac8822

3 жыл бұрын

i always wanted a explanation for that

You can also find these lenses in the back light path in LCD screens

@KalRandom

4 жыл бұрын

Cool that's exactly what I was wondering. Time to go digging in clutter, think I got 3 of them. Play time with grandkids.

When I first saw the videos of the "magical invisibility shields", it didn't take long before I noticed they always used backgrounds with horizontal features... And I figured the "shield" only worked horizontally.

The REAL magic trick in this video is how he got the pliers to remain standing on the table after he removed the wooden support sticks. But seriously, nice video about the optics of a fresnel lens! I also learned that all these years I've been pronouncing fresnel wrong. (it's fray-NEL and not FREZ-nel)

@mikeakers1209

4 жыл бұрын

Super glue has many uses

@juliangaribay4711

3 жыл бұрын

Or the pliers are super squared off on the tip not really impressive

@caterpillar6298

2 жыл бұрын

Its called a nail

Love how clear and concise you are, thank you very much!

Knowing that the pliers are there, I can see the reddish hue of the handles. If I didn't know they were there, I'd probably be blown away! Always look forward to your videos my friend. Always worth the wait! God bless.

I've only seen this video by this creator and can already tell that he's a jewel of a human being. Very well done content, explained in a way that anyone can understand. Good jerb!

After seeing it on Daily dose of internet i was wondering how it works you explained it well 😊

That was really cool. First time I heard of and saw this lens demonstrated. Thanks 👍

I was always curious how this illusion worked, thank you for sharing. These videos are always so well done and I absolutely love watching them!

It's just a real life rectangle of content aware fill

@YuutaShinjou113

4 жыл бұрын

Yeah true

@nadamastodo9499

4 жыл бұрын

Is magic

It makes it even more fascinating now that it’s been explained, it’s absolutely amazing

If you were my science teacher in high school I might have gone into science. Really enjoyed your presentation

I feel this could have applications in the marine environment.

@cjonh808

4 жыл бұрын

ok

@cheekypasta55

4 жыл бұрын

Not when sonar exists. This only works for bending light to cameras and the human eye. Radar and sonar won’t be affected by this at all.

@Bourinos02

4 жыл бұрын

But why though? Contact is made with radar since the brink of WWII, no-one uses optical ID anymore...

@demodemo5146

4 жыл бұрын

The Philadelphia experiment

@DrewLSsix

4 жыл бұрын

@@demodemo5146 that's not a thing, the story disproves itself.

It's been too long. Super happy you're back

Thanks buddy you always give a practical and real world approach and explanation on what you do and breakdown, keep up the amazing work

I've heard of this elsewhere but I found your explanation on point

And our next act on Penn and Teller's Fool Us...

So impressive, that I bought two of them before the video was ended 😂 Thanks 👍

@3d-printtaaja454

4 жыл бұрын

4 here. At 10 seconds or so. I want to cover something from all 4 sides.

@dawnofjustice4689

4 жыл бұрын

Sounds interesting 😊

Although I’ve only watched a dozen of your videos,your instructions,narration,and filming are clear,concise,and highly professional.You would be an asset to worldwide producers i.e. National Geographic,BBC,etc..

@jonpiotrowski3506

4 жыл бұрын

I highly recommend sending demos to any renowned company for potential employment.Yours remind me of the old “Wild America “series by Marty Stauffer,only with better video and narrative...

I remember these from the late 90’s CD covers and promo posters. A photoshop app slices two images to give the illusion of motion or transition to something else when the lens is applied.

I was once shown A great way to explain how these work. Lenticular lenses use a similar property as Fresnel lenses. A curved surface, glass or plastic, will bend light. Or more generally, light bends at the interface between to optical materials, Air and water, air and glass, air and plastic. This is how magnifying glasses, and camera lenses work. a typical camera lens is curved on one side and flat on the other. The bending occurs at the surface of the curve. any bulk between the flat part of the lens and the curved part is not necessary for the lensing effect. So if you slice a lens, in this case horizontally, into thin slices, you can remove all the material between the curved part and the flat part, then put them all the remaining parts back together. now you have a lens that has the same optical properties as the original bulky curved piece of glass/plastic, but in a nice, easy to manufacture, uniform width. This effect scales to very large, and very small, and also works with horizontal slices, vertical slices, circles (Fresnel), waves, random slices. This process can also be conducted on a prism, which could be thought of as a lens, only with flat surfaces. A prism bends light. Lenticular lenses can be thught of as the "flattening" of a prism in the same way a fresnel lens "flattens" a curved magnifying glass. This makes a lot of sense if you have a drawing of a magnifying lens from a side on view, act as an illustration.

@Wik3dNuTS4k

4 жыл бұрын

Holy fk im not reading all that

@jacksonpercy8044

4 жыл бұрын

Maybe a visual demonstration of that is good for explaining the phenomenon, but as text it just sounds like mumbo jumbo.

@davelowe1977

4 жыл бұрын

Lupo Grigio Brilliant explanation!

@The_Essential_Review

4 жыл бұрын

I read it, but the explanation itself he could have been better

@davelowe1977

4 жыл бұрын

MondoManDevout Not everything can be reduced to the simplicity of a colouring book.

It just seems like it's a massive horizontal blur, which tends to hide things because foreground elements like people tend to be vertical while landscape elements like hills and lakes tend to be horizontal.

i love how i have one of these for lenticular prints nearby and never knew of this trick. trying now it's working a charm!

Flipping awesome man!!! Thank you so much for sharing! I'm really looking into that!

I remember people using larger ones similar to these to put in front of the TV to get a 'bigger' picture, back in the 70's

@steamboatwillie8517

4 жыл бұрын

And the ones with three coloured horizontal bands, blue top brown mid and green bottom type ones, to ' convert's a mono to a colour(ish) tv.... technology or what? Living the dream :0)

I could see these used in office vitrines, you just have to put a striped pattern on the back wall and boom, everyone inside is invisible

Hi Ben. Newbie to your antics , just found you. . I have had several attempts at using the Ferrell lens with a led back light , by taking away the lcd screen (usually cracked making the tv useless) and using the left over parts to create what some people can’t understand as a 3D void affect , the sheets in using are regular tv sized. Also remove the leds from the tv as the voltage to run them are horrendous, and replace with 12v rgbw. They also make for an excellent daylight in dark corners of your home / hallway / staircase. And cheaper to run than a normal household bulb. Looking forward to more of your antics experiments funny thing 👍

AWESOMEEEEE! Thanks for always sharing cool quality videos! They are great :)

Guy: *Demonstrates item* Guy: Now let me demonstrate item.

I was hoping his only explanation would be “it’s just magic” but no.

@Voron_Aggrav

4 жыл бұрын

any technology far enough advanced could be explained as magic, mean if you'd take someone from the 1400's to the modern day He'd exclaim witchcraft and magic from most of our modern comforts,

@dashingquad

4 жыл бұрын

Come ooooon, it's very simple the explanation

@jonjohnson102

4 жыл бұрын

Jfm

@CreatorCade

4 жыл бұрын

A Ludors lens even sounds like a magical D&D item +1 invisibility. 🤓

@eggheadusa9900

4 жыл бұрын

Mary Carrero Llovera Yeah we all seen Thor we know

Thanks for sharing the knowledge man!! I appreciate it heaps! So good to see a guy whos not just trying to show off and 'mind-blown' everybody!

Great explanation! Thorough but concise.

Problem is, you also can't see the enemy from behind it.

@alext9067

4 жыл бұрын

Yeah, that might be important. You could drill two eye-holes in it like the spies do with the newspaper in the lobby of the hotels.

@TF2Scout_YT

4 жыл бұрын

Unless you have heat vision glasses to see them from there temperature

@tweakerkid

4 жыл бұрын

Mount a camera on the front, easy

@Drew791

4 жыл бұрын

It’s Arabia Fats!

@thugasaurusrex6004

4 жыл бұрын

Sure you can, you just need to use a different light ;)

Alternate title: How to break the lighting engine | Glitch Showcase

Awesome. Thanks for the great explanation. :)

Just a simple thank you for your explanation. It's nice to learn something new

Thank you for pronouncing 'Fresnel' correctly. 👍

@kendokaaa

4 жыл бұрын

Don't you just love when someone says freznel?

I am a photonics student, so I worked out how it worked in the first 5 seconds. xD

Hi Ben, you explained that so I could understand how that works. Not being a Physics person I had wondered about the material when I saw a guy making an invisibility shield in another video. But when you did yours with the pliers it worked better. So is smaller better in this respect.

PHEW! I’m glad it was just an invisibility cloak thingie... For a second there I thought that you’d lost a perfectly good set of pliers! Another very thought inspiring topic! Thank you!

My father left to buy a ludor lens. I'm still waiting for him. Sometimes I hear him though.

Where can you find large versions of it? Like big enough to recreate the riot shield?

@undersiege3402

4 жыл бұрын

dismantle a 50'' tv, some have this sheet combined with a diffuser too

I can feel the noise its making as hes rubbing the lens against each other. We used to have a tv like that and my family would also mess with me by scratching the tv with their nails. It literally sends shivers down my spine and i dont know why lol

Nice content dude, thank you for the information you gave

I accidentally printed one of these on my 3d printer. I was printing with some clear PETG in the process of designing a lamp diffuser. With the 0.2mm lines running horizontally from each print layer, it made a single axis vertical diffuser. Nowhere near the same image quality, but thats fine for a diffuser.

@kendokaaa

4 жыл бұрын

I was looking for an excuse to buy some clear PETG, now I have one

@anasmrright

4 жыл бұрын

And now you can't see the lamp?

Well I'm disappointed. I placed one over my credit card... Still have debt. 😔

Very good example of this technology.

Great demonstration and explanation. Thanks

You can get big versions of those Lubor's lenses out of LCD TVs, though don't expect to be able to rob a bank with them... :P

The Moore Ray effect can also make you feel eel

@wdeltag

4 жыл бұрын

I don't wanna feel any eel.

This is very similar to how a cylinder lens (used to correct astigmatism) works. It refracts light in one direction but not the other. Like if you're looking through a clear water-filled bottle, you would see vertical objects behind the bottle relatively clearly, but horizontal objects appear very blurred.

They put these lenses on the backs of school buses I had growing up. It was awesome because the driver really could see all the way down the isle into the fresnel lens and it would show pretty much everything behind the bus. It was a spherical fresnel lens that produced a fisheye effect, not one of these fancy Lubors lenses. I can see how this material could be useful to see around corners in a variety of applications

I want a genetically modified fish that has fernell lens for scales

@ewthmatth

4 жыл бұрын

That wouldn't do anything. Did you watch the video?

@ericgillespie2812

4 жыл бұрын

@@ewthmatth your imagination must be very unfun...

@whoswho734

4 жыл бұрын

Glass fish

@korrokiaternak8655

4 жыл бұрын

Transparent fish

@morfeo7750

4 жыл бұрын

there are actually some fish in the bottom of oceans that have translucent skin and some times you cannot see them...

The Romulans would like to have a word with you...

@Nighthawkinlight

4 жыл бұрын

Oh come on, that treaty doesn't come into effect for another few hundred years. I'm grandfathered in

@eddavis91

4 жыл бұрын

He'll yeah. Good one.

@hanelyp1

4 жыл бұрын

The Romulans have much better cloaking devices.

@onionhead5780

4 жыл бұрын

Touché my friend. 👍

@VitoVeccia

4 жыл бұрын

USS Pegasus.....

Who else can’t wait for each new video. Love your channel man.

Thanks Ben, your video was interesting and I enjoy it, Regards from Argentina

There are two of them - one vertical, one horizontal, in most LCD screens.

@raytracer9013

4 жыл бұрын

In fact this is 2 polarizing filters and this is in all LCD, this is the way LCD works, the liquid crystals are between the filters and can "twist" the light to let it pass through.

@AndyCallaway

4 жыл бұрын

@@raytracer9013 Yep. Took one apart once. It was fun playing with the two polarizing filters. Cellophane between the two produces interesting effects.

@anullhandle

4 жыл бұрын

@@AndyCallaway you are looking at stress gradients in the plastic. Put a clear plastic fork between two polarizing sheets. The rainbow pattern makes the molded in stresses really stand out.

@snorman1911

4 жыл бұрын

Eh, polarizing filters are not the same as this.

@AndyCallaway

4 жыл бұрын

@@snorman1911 Understood. I know Ben was talking about the diffusers, but we went on to talk about all the different sheets of plastic inside an LCD screen.

The real trick is how the pliers stayed standing up after removing the wood dowels that was holding them up!

@malachifry3525

4 жыл бұрын

It’s literally clamped on a nail

@animefreak5757

4 жыл бұрын

@@malachifry3525 that type of plier doesn't lock. what your thinking is a nail is actually glue, from the grey color probably jb weld.

When I was a kid I had a thought that mirrors would be how we could make things invisible. I can’t believe I was not far off

That's amazing! I've never seen pliers stay up like that!

@ruthannmarie7119

9 ай бұрын

Think they on a bolt, balance?

First, Amazing video as always. Does the effect require that the thing you want to dissapear to be at a specific or optimal distance? Also since it's a prism based thing, does the type of lighting affect it? Would it still function if the light source was a single color?

@Nighthawkinlight

4 жыл бұрын

The further behind it you are the better. It should work the same under any lighting

@redcastlefan

4 жыл бұрын

@@Nighthawkinlight thank you for sharing.

@savitrrakatamatah7256

4 жыл бұрын

further is better but also it takes the side views from much further away which can be another problem in certain applications.

I know that could hide the object however some could see the blurry object in the distance

Hai Ben,I like your channel full of educational knowledge.Tyvm.

Holy crap I haven't seen your videos in years I'm so glad to see you again

So that's what John Cena been using all this time.

Who else watching this through a late 90’s tv and just see a bunch of lines? 😂

@notaprogrammer7970

4 жыл бұрын

That's pretty impressive, how is your set up?

@notaprogrammer7970

4 жыл бұрын

You must have an HDMI to avg converter. Got it.

@Loqanmiqht

4 жыл бұрын

Y’all are stupid or just stupid 🤒

@notaprogrammer7970

4 жыл бұрын

@trandmain My my the low IQ zoomer has spoken, please further impress us with your critical thinking skills and masterful discernment. You probably have no clue what I am even talking about. I'm 27, and you are so stupid, you make a giraffe look smart.

Great explanation. Love your videos

Also used to create a type of changing image often used on toys or children's book covers. Held one way over a specially printed image, you see the first image, moved slightly and you see a second or even a 3rd image.

Almost looks like horizontal and vertical polarization, which is how modern 3D movies work.

Is this the same kind of tech that's used in that new ford "no trailer" backup cameras? Probably not, but I need to know how that works too!

@robo08ify

4 жыл бұрын

ThirstyCartoon That’s GMC, not Ford.

@ivanleterror9158

4 жыл бұрын

I believe that's a separate camera that mounts to the trailer. ????????

@jermmcnasty420

4 жыл бұрын

@@ivanleterror9158 its an array of cameras. The input from each one is blended on the screen to appear as if its all one image. Watching the image you can tell where they blend.

Excellent explanation. Thanks!

This principal is used with a micro flat to check for minute variations in flatness of a surface using a monochromatic light source.

@Nighthawkinlight

4 жыл бұрын

That's pretty clever. I'll have to look into that

@WaltRBuck

4 жыл бұрын

Don't tell flat earthers!

we had that crap on are books at school like 6 years ago

It’s a cool effect but this use of it has severely limited applications. I don’t see how the police or military could use this effectively outside of fixed defenses in bases or cities. I’m sure that this weird phenomenon will eventually find a use, but it will probably in a totally unexpected way.

Thank you for the education on these lenses.

Great job! Love it!

I'm pretty sure all my clothes are made from this stuff. I can walk through a crowded room of girls and not a single one would notice me.

Perfect material to hide my crying in public places

Excellent presentation thanks.

Excellent and usefull job!... Thank you, Dear. :-) From Brussels, with Love....

I literally saw this thing in China when I was 11... Sometimes I feel like internet hypes everything up, no matter how old they are... And people go APESHIT over it... I really need to find something other than internet as my news source...

@michaelqdlap

4 жыл бұрын

When you were 11. So- 40 years ago, or...?

@hyperiusnovani

4 жыл бұрын

Does it matter if the thing being hyped up _is actually good_ and not many people know about it? Not to mention that this was an educational video. I don't know what you're thinking but I feel bad for you if you use _KZread_ as a news source. This is a place for content, and if you want controversial news, this isn't the place to look for it. However, educational videos are something KZread excels at, given that you're looking for something specific. The other thing is that you shouldn't do is compare KZread to the _Internet_ . That's like comparing a nail to the factory. Hope you learned something from this, and I wish you a good day!

Last time I was this early we still hadn't seen your face.

I noticed a really neat effect while I was playing with a 12in x 8in fresnel lens the other day. While I was trying to focus light from a lamp in my house at night onto the wall, I noticed at just the right angle and distance from the wall, it actually projected an inverted image of the room onto the wall. When I got it just right, the detail was really well defined, even though the image itself was only maybe 3in x 2in, it was just like looking at a little upside down picture. It was well defined enough that from 20 feet I could make out things like a light switch on the wall, or a wooden display case with everything in it, and even some 3in figures I had sitting on top of the case. It was so neat, I couldn't stop playing with it. When I tried doing it in a darkened room with the light from my TV. Focusing the light from my TV onto the wall. It projected a perfect image of whatever was on the TV onto the wall. And even the RGB LEDs in my computer next to the TV. Albeit much smaller and again, upside down. It even worked with a little 1in x 2in fresnel lens magnifying glass I had. Although not as well as the larger one. I'd definitely recommend trying this if you have one lying around your house. I picked up my 12in x 8in one at a surplus store being sold as a magnifier for reading. It's just a wobbly piece of plastic, so it's hard to keep it still. So I plan on building a wooden frame from it. You could probably buy one on Amazon or something. It's not quite strong enough to melt rocks with. But I did burn a nice sized black mark into my kitchen table with sunlight coming through the trees and into the window. lol

Great video. You are a great teacher. Thank you. Frsnel lens is a great simile. LUDOR lens