Shining Light Through Solid Balls Using Quantum Mechanics-Poisson's Spot Experiment

[@TheActionLab]

Just noticed something. Look at the shadow of the wire and notice how there is a bright line right in the center of the wire! That is the same effect happening in a linear fashion. I wish I would have noticed in the video!

[@libratyanjhon3959]

5:57

[@sourvad]

Wow yes, I've seen this experiment with round objects before but not with linear objects. It surely is much more easier to spot the wire's shadow. Good find mate.

[@libratyanjhon3959]

@@sourvad wire = elongated 'sphere'?

[@sourvad]

@@libratyanjhon3959 yes correct, but it is more linear than spherical. So I took the liberty of ignoring it's spherical nature.

[@slots7775]

The Action Lab Can you create water out of nothing?

[@logancapes]

Poisson set himself up in a win win. Either he was right about the particle theory, or his math skills were on point.

[@nemonomen3340]

True, but also imagine boasting that there's no way something could exist and then getting it named after you. I know I'd be at least a little embarrassed.

[@michaelmiller2210]

Nice profile pic L

[@logancapes]

​@@michaelmiller2210 It acts as a silent handshake to identify those with good taste. Thank you, Casserole, my brother.

[@nemonomen3340]

@@michaelmiller2210 ikr. Fun fact: I learned yesterday that there's a _musical._ It was never fully developed into an English version, but there are songs on KZbin. It's been out for years and I had to learn about it from a _"Good Omens" animatic!_

[@aiexzs]

quantum win

[@TheMilitaryFeed]

this doesn’t work anymore this glitch was patched by the government in Earth v.5.17.2020

[@ZawayixFalconer]

Error, v5.17.2020 isn't set to release for 3 more weeks

[@-cookiezila-461]

Official patch notes for v.5.17.2020: Fixed a glitch where the atom at coordinates 1235324745453432324344454675 455377644456 169865688542244421245678986423578632478 dissapeared

[@-cookiezila-461]

Thats it, I think their keeping the glitch as a feature

[@randompersonoftheinternet8012]

jsdothatshit the official patch notes just got leaked: -Coronavirus experiment will be concluded -Light wrapping around spherical objects will no longer occur -End of the world trials: stage two (INFERNO) will begin -Time relativity will be reset Set release date: 23T.894.3N1 (2-26-2020 on Earth)

[@josephybarra9404]

Matrix patch 1.12.480

[@paulierymenko4411]

Warning: It looks like you could "try this at home." Please: Do not get behind the screen with the little hole in it to see Poisson's spot with your eye! And in general, do not look directly at any laser, not if you value your vision. He really should include this warning.

[@sophierobinson2738]

Hi! Late to the show as usual. He actually thinks his viewers are smart enough to know this.

[@iztaex2488]

Yea… we’re not all as dumb as you.

[@NicktheBlkBlt]

safety is never an invalid concern, it is a good warning to provide.

[@Rabbotic]

@@iztaex2488 speak for yourself...

[@brm7469]

Thanks mom

[@wtakerisks]

Legends say he’s still smiling after the video

[@TheActionLab]

😃

[@xerone5733]

Is this a black mirror reference ?

[@XtremeQuantumSrength405]

@@TheActionLab i wish i had that many views

[@Nameless6914-t7s]

Well Legends were True 🤣

[@MammaOVlogs]

Geen Naam lol

[@RGMS_]

this guy always seems happy and sad at the same time, im confused

[@joshuhigashikata9201]

He seems tired

[@joshuhigashikata9201]

But also very awake

[@nothin1456]

Lol hilarious , he seems chill!

[@dominus6695]

it's his quantum self ya'll

[@Doodlezeee]

Right bro 😂😂😂

[@itspennywise1179]

I shined the light on my balls for a class project, and all I got was detention.

[@garyvigue]

Use a more powerful laser next time if you want to make an impression.

[@johngarcia222]

Lmaoooo

[@khairinarif369]

Great

[@khairinarif369]

Maybe because you are the pennywise from IT

[@ytlongbeach]

were there two spots on the other side?

[@Scugzerker]

There isn't much more interesting/captivating than witnessing a quantum physical phenomenon take place right in front of you.

[@doriangoff2474]

I was messing around with a basket ball and I spun it really fast and let it drop to the ground, but when it hit the ground it reversed its spinning direction. I found this weird and I am curious for an explanation

[@TheActionLab]

well the ball is going down before it hits the ground, and then goes up. So it's reasonable to believe that if it was spinning one direction before it will spin the other after it hits. This is due to the elastic recoil pushing it in the opposite direction it hit the ground with. I should do a video on this:)

[@jjk2one]

An opposite reaction... but why

[@vexari_]

always wondered it too..

[@JuniorBoi]

@@TheActionLab no it doesn't happen that way....that's considered to violate the newton's second law if so... This is easily observed with the a cricket ball , if you get ro spin the ball it would change its travel direction to a certain angle after it hits the ground or for a faster ball spin you would notice a magnus effect yet ball follows the direction but would never change its spin to opposite direction coz it not only requires exact amount of counter torque but also a bit of extra amount .. For a perfectly elastic collision(** if you theory is correct **) the ball should actually stop spinning but can never get the opposite spin

[@MammaOVlogs]

Dorian Goff good explanations action lab

[@maruftim]

Poisson: there's no way it's a wave lmao *does an experiment *surprised pikachu face*

[@camtisxr1430]

That lmao Just makes it Perfect

[@tanasirobert9157]

Camtis why Do you capitalise Random words?

[@maruftim]

@@tanasirobert9157 lmao Yeah why is That

[@camtisxr1430]

Its my autocorrect somehow. Dunno why it is doing that

[@HilmyA.S.]

More like : "...... Nahhh i must be high as fuck"

[@mendelson6052]

Given the proper circumstances, would you be able to find Poisson’s spot in the shadow of the moon during a solar eclipse?

[@hak4fak]

he said the ball has to be close to a perfect sphere,i doubt the moon is close to a perfect sphere

[@mendelson6052]

I must have missed that! Still interested to know if it’s possible at that scale though!

[@tomatenbomber8830]

Usually stuff like that only works with coherent light that has a consistent wavelength (like a laser) and if the process during which the light is "created" isnt irregular. The sun emits many wavelengths at very small irregular intervals because the main light source is fusion which is very spontaneous. Might still work tho maybe there is some weird effects canceling each other out...

[@gustav9885]

The sun isn't quite a point source of light

[@yogeshkumar9311]

@@hak4fak Also, It needs to be smooth as hell!

[@LorcanG]

This channel is one of a kind, you never see channels both being equally entertaining and interesting and original

[@cprograms4280]

"you can't see my face because the basketball is in-front of it" Well would you look at that?

[@noah.9039]

I thought it was because he has a tiny ass head

[@KJ-rq2ft]

no.

[@drippy.mcflip]

Matti is that you?!

[@yesd2024]

Theoretically you can because the center of the basketball is the brightest spot meaning theres light passing through but its so small that we cant see it

[@germanboy1124]

@@yesd2024 that was a good one

[@NoobSaibotVII]

I'm confused on why Todd Howard is talking about light and not making Elder Scrolls 6.

[@maxx9137]

lol

[@jeffthedick3793]

lol

[@gf920]

How does this comment not have more likes. Underrated comment tbh.

[@GhostDrewSenju]

Get ready for the ray tracing.

[@xidemonslayerxi4510]

Heh, wow.

[@user-vv2iz7ly8q]

Poisson (mockingly): if it were actually made out of waves, then directly in the center would be the brightest spot. *Directly in the center is the brightest spot* Poisson: am i a joke to you

[@DrDomich]

@tinylilmatt yeah. For a nerd - the best joke ever. 🙌🙄

[@owah]

MALEK001 001 i wondered how many comments it took for me to see someone say that

[@nuclearshorts1243]

Well, now he is

[@fredspofford]

@tinylilmatt No it's still stupid and sadly unoriginal. No objectively funny person repeats memes in un-ironic situations.

[@sangramjitchakraborty7845]

@@fredspofford maybe because there's nothing like "objectively funny"? Humor is subjective.

[@protonmaster76]

I think it's important to note that you must use laser light, as it is monochromatic. A standard light will have multiple frequencies and will not constructively interfere like that.

[@TheMapman01]

Is that true? Would not each constituent wavelength constructively interfere with itsself?

[@protonmaster76]

@@TheMapman01good point, but a laser is both coherent and monochromatic. Meaning that all the peaks and troughs of the laser light are in phase with each other.

[@TycTycHehe]

No, neither monochromaticity, nor even (temporal) coherence are needed. Arago did it with a flame light. What you actually need is spatial coherence at the distances of the order of the diameter of the sphere, so that each wave packet arriving at the sphere is cylindrically symmetric with respect to the axis between the light source and the sphere. For this you can just make sure that your light source is small enough (e.g. emitted through a pinhole) and far enough away from the sphere (this doesn't have to be very far: a few dozens of sphere diameters should suffice if the pinhole is much smaller than the sphere).

[@avcomth]

Well this guy gets his video on the chart by only yelling out only the WOW factors of an experiment and leave all the actual reasonings vague on purpose. Notice how in this video he kept mentioning the light going "through" the ball before reluctantly admitted it going around the sphere 's surface in the end.

[@marianl8718]

@@TycTycHehe Everything you showed is absolutely correct. And this video has a lot of shortcomings !

[@Windows11Guy798]

Who clicked on this video to actually see him shine a flash light through a basketball Edit: thanks for 2,5k likes guys ☺

[@foreign_physics8490]

You can fool some of the people all the time but you can't fool all the people all the time.

[@scottmcintosh4397]

Obviously, you did.... I just clicked on this to laugh at you 😂

[@lordot8665]

C Yashwant so they quote Abraham Lincoln without giving him credit. Loooooooseeeers.

[@j.a.f.e.r7482]

You can fool some people sometimes but you can’t fool all the people all the time

[@pradipsiwakoti9352]

@@scottmcintosh4397 MAD LADDDDDDD

[@fatjesus1125]

Nobody: John Cena explaining why we cant see him

[@chasemcdonald7250]

Lmfaooo how does this comment only have 30 likes

[@p_pthenoob]

@@chasemcdonald7250 cuz they can't see this comment

[@alx2900]

This comment and the replies are so perfect

[@michaelrebello4918]

You have 420 like... should I like this comment or nah?

[@fanndx]

Clearly most people see the like button but reply button

[@plot4445]

Poisson: Light doesnt have the properties of a wave, I'll prove it with something ridiculous his calculations: congratulations, you played yourself

[@SimonClarkstone]

See also: people trying to use proof by contradiction to prove Euclid's fifth postulate.

[@danielsavluk7556]

I can't get over how close his eyes are it pisses me off. He should keep that ball in front of him.

[@pomelo9518]

I was always confused about how photons could not pass straight through the gigantic separations between electrons, protons et cetera. I thought about the large particles pulling the light in, but I recalled that you need a black hole to do that. This was informative.

[@krebgurfson5732]

that's not an accurate description of an atom

[@forsakenquery]

The electric fields around the atoms components is the dominant force in the atom. Light is a wave in that field

[@MichelleHell]

The light is oscillating it's intensity according to its wavelength, so it has a high probability of hitting the atoms electron cloud, if the material is thick enough or has the correct properties

[@neutronenstern.]

A good model to see how this blocking works, is by looking at the fact, that atoms can absorb a photon. So if wavelength matches ths properties of the atom, the electrons of a arom take away the energy of a photon, if it comes near enough. So the photon will excite the atoms,and in return, it will be gone. Then the atom might release a new photon later, but in a random direction, or this energy just goes to heat. Also a photon can get reflected.

[@Swrld]

Would this happen in a solar eclipse?

[@TooModernArt]

Well that's a good question.....

[@Kei3th1424]

That's a good question. Leaving comment here just in case someone care to explain

[@sejalsoniashivprasad5442]

I thot the same tho

[@pizzaboydeluxeyt6702]

I would think that non metallic planetary substances would not create such effects, however with the intensity and direct travel of solar light, it could perhaps be possible. 🤷‍♂️

[@g.ferreira6745]

I don't think so, but I'm commenting just in case anyone have a better explanation

[@sonixka257]

We found Poisson’s spot but can we find G-spot?

[@dallyh.2960]

scientists are still baffled I'm afraid

[@hannesgranlund8838]

Dont ask a nerd about that

[@eathanneal9031]

@@hannesgranlund8838 Why? They'll give you the exact coordinates. Lmao

[@hannesgranlund8838]

Yea, in hubble space...

[@alejandrozuniga4426]

@@hannesgranlund8838 gamers

[@kingsmencrown5763]

If I had a teacher like him in high school I would have never missed his class even if I had to drag myself in.

[@briannolan7818]

What, you like guys with stubbly beards?

[@freehoya4276]

@@briannolan7818 maybe because he actually explains the topics he is teaching and not just rambling from a text book

[@briannolan7818]

@@freehoya4276 - True.

[@worldwolf9527]

@@freehoya4276 True

[@wulfrion]

I think he is terrible at explaining this. Don't get me wrong, I understand everything he is saying , but to an average person this is awful teaching. There's much easier ways to explain the same thing he explained so that more people understand it and thus get excited by science.

[@TrailBlazer5280]

One of the coolest demonstrations. And just as cool to see the interference surrounding the ball too.

[@zacharysherry2910]

Yeah and it wouldn't have been so effective if the lightsource wasn't the laser since it has striations

[@simon6071]

Actually, in this experiment the laser light does NOT shine through the solid ball. Doing the experiment by soldering the ball inside a hole on a steel plate instead of hanging it on a wire can prove that to be the case. Light wave around the ball being able form a bright spot behind the ball due to constructive interference of the light wave around the ball does not mean light actually pass through the steel ball.

[@pedro_mab]

@@simon6071 that is not what the experiment demonstrates. did you even watch the video?

[@simon6071]

​@@pedro_mab I'm not talking about the experimental result being wrong. I'm talking about the misleading title of "Shining Light Through Solid Balls Using Quantum Mechanics." The light waves travel around the steel ball to form a bright spot at the back of the ball with constructive interference. The light waves did not go through the ball.

[@윤희건-w3q]

@@simon6071 I think its mentioned at the near end of the video that the wave forms a light point around the ball which interferes with each other to form a bright spot Yeah but he could’ve been more clearer and said light goes around, sure

[@lrba5524]

evidently whatever's impeding my vision of John Cena is non-spherical.

[@coolguy9732]

Well fucking played 😂

[@wachyfanning]

No, John Cena IS the sphere

[@AvidiaNirvana]

I came to the comments looking for someone talking about Cena. Found it. Hahaha

[@soupham8156]

Now try this with the blackest material you can get

[@huntermoeller4040]

Yea......🤔

[@syth-1]

This, a metallic shiny object is nice but how well does this effect work on something that absorbs all light??

[@ciencialogica7783]

A 2.0 black ball, that is all. Wave or not wave

[@xcnnugget1794]

@G W Did i ask?

[@750kv8]

Makes no difference. Reflection of light (from the ball) got no role here.

[@alimroueh31]

The reason u can't see me when i move this basketball infront of my face is because there is a basketball infront of my face.

[@Tailspin80]

I could see him quite easily.

[@JoShPEt1993]

😂😂

[@rabeebibrat1805]

good point😂😂

[@puss_n_booze]

mm, yes, the floor here is made out of floor

[@kcvanderpool]

Science 100

[@PsyloSatan]

7:44 made me feel like I was in school again. My mind instantly fell in the gutter right in the middle of class.

[@matthewtalbot-paine7977]

That's a butt!

[@goodgenes0]

@@matthewtalbot-paine7977 saggy balls

[@Milesco]

​@@matthewtalbot-paine7977 LOL... exactly what *_I_* was thinking! 😄

[@JordanTheMann]

I’m still waiting for him to show us that flashlight that can shine through basketballs... I must’ve blinked and missed it.

[@sachak]

LMAO

[@Cheddarizbetter]

clickbaiter

[@bitorange5549]

The waves go around the object not through anyways. This guy loves to spread his false clickbate titles it’s disgusting

[@bitorange5549]

Arin B. Jesus man don’t be so pretentious. He is referring to light of wavelengths/frequency on the visible spectrum. I’m sure you are smart enough to realize that is what I am referring to as well.

[@bitorange5549]

Arin B. In addition to my previous comment. “Light” is normally defined as “visible light”. Gamma radiation is typically not referred to as “light”. Simply as radiation.

[@PyroXeNeX]

My mum was always getting annoyed when I'm on youtube for a long time but this stopped after I showed her ur channel (edit) OMG thank you for 133 likes guys!!!

[@MammaOVlogs]

Moukis 2.0 that is awesome from one mom to another

[@mamupelu565]

Well maybe she misses talking/playing with you.

[@PyroXeNeX]

@@mamupelu565 No she want me to study for school.... But we have summer break

[@samirnawrozada1799]

@@PyroXeNeX already?

[@PyroXeNeX]

@@samirnawrozada1799 ye😂 idk what she wants from me

[@davidroddick91]

It would be more accurate to say that the light went AROUND the ball, and the interference pattern it created resulted in a bright spot in the middle.

[@hermannbrosinger3835]

I mean .. he kind of said exactly that, a little late in the video I admit, but still ..

[@limp_dickens]

Yeah, you could explain it in a really simple, clear, objectively true way but then you won't get a bunch of people thinking "wow, science really do be like that" and that would negatively impact likes and subscribes.

[@brodylockwood14]

@@limp_dickens He had to drag it on to make it 10 minutes or he wouldn't get paid. All his videos are about 8 minutes more than they need to be.

[@anodosarcade7355]

@@brodylockwood14 if you dont want to watch videos, why dont you just read wikipedia or twitter?

[@irokosalei5133]

That's not how quantum mechanics works. The light is just a wave of probability and they constructively interfere at the center of the ball.

[@charlesvandenburgh5295]

I wish back in high school I had a science teacher this good and fascinating.

[@sparkyzcc6178]

Most he does is way to complex to be taught in high school. So its just not possible to have such fascinating classes in school.

[@neutronenstern.]

​@@sparkyzcc6178 stuff you learn in school is still vrty fascinating, if you are more interested in details, than in really new stuff. What he does is, he gives some basic information about a topic, that is very very new to most people, and which will then fascinate one. In school however, you learn in physics about stuff you see everyday in a more detailed way. E.g if you learn about centrifugal force, you have all already seen it, and might think its boring. But if you are interested about how one can really describe it, and how and why it works in detail, then school physics is very very interesting. You've got to want to know how things work in detail, even if you have seen it a lot in your life, to be fascinated by school physics. But sadly most people arent. They are only interested in completely new stuff, they havent already seen, cause they are easily bored.

[@sparkyzcc6178]

@@neutronenstern. wow nice point of view about that topic

[@DamianReloaded]

9:00 The light went through it without actually going through it. /face XD

[@yinyang1217]

delete ur pfp

[@xiaoshen194]

2000s- John Cena : *YoU cAn'T sEe Me* 2019- TAL : 1:51 *You don't see me.*

[@hitowshitt]

Lmao.

[@grisannetr1146]

Oof when you said Tal I got shook I thought you meant someone else

[@petrosarv1295]

@@grisannetr1146 michael tal the magician

[@grisannetr1146]

@@petrosarv1295 ?

[@setharookazoo]

I am seriously making a t shirt of this 😂😂😂. With his face and the basketball 😂

[@aryansubramanian4756]

Nice video, action lab. I would like to see more videos on quantum mechanics. You made it really easy for me to understand it. :)

[@onthedepth69]

Ya I also want video on quantum mechanics

[@preciousshittu1768]

Yeah I found this pretty helpful

[@ThePrufessa]

Do you see all the comments from people that watched the video and didn't learn a single thing?

[@RexxSchneider]

This isn't a video on quantum mechanics. It's about Fresnel diffraction.

[@StephenSLG]

This is real science ladies and gentlemen! Something that you can observe, study, and demonstrate.

[@qingyangzhang887]

Wait I thought Quantum mechanics doesn't really come into play here. I thought that this phenomenon can just be explained by considering light as a wave, and the lightest spot in the shadow just being an interference in the diffraction of light around the ball.

[@Rahul-rp5hk]

I have the same doubt!

[@ThePrufessa]

Yeah I think the quantum mechanics has throwing people off. I think people think the light is bending around the ball and that would involve quantum mechanics.

[@gocommitbreathe21oxygen11]

@@Rahul-rp5hk why is your name so long

[@rfimor]

QM sounds fancier than classical electrodynamics.

[@TooModernArt]

If it was just the interference of diffracted light then it would have depended on the distance between the ball and the screen

[@GraveUypo]

Well, yours is definitively by far and away the best "home-made pop-science" channel on youtube. no comparison.

[@MrInventer80]

I'm soery but this guy is far behind vsauce. His explanations are nowhere near as clear.

[@ujjwalbhatt4410]

Hope vsauce starts uploading again

[@MrInventer80]

@@ujjwalbhatt4410 he's been uploading on D!NG idk why not his main channel. Maybe he's using his main channel for the youtube red episodes of mindfield he's still doing

[@ujjwalbhatt4410]

@@MrInventer80 i know the reason- he forgot his id's password by which he had made his you tube channel😑. Just wish he would be back

[@jensphiliphohmann1876]

I like all of them.

[@nisharanidas6651]

Physics: nobody can break my rules Quantum mechanics and Russians: hold my beer

[@mrsoftware7828]

Quantum mechanics is also physics... and even rusians are made of atoms

[@chandrakerdinesh3480]

@@mrsoftware7828 that was rad

[@crusader2338]

Thanks for the free r/IAmVerySmart karma!

[@fgvcosmic6752]

Mr Software but it broke KNOWN physics when discovered

[@FreshBeatles]

hardbass

[@b1ackwa1tz2]

I know I'm behind, but I wanted to remark that it is interesting to note how the point of magnetism also appears to affect and bend the light. Also, do you think it might be possible to see this effect during an eclipse?

[@10pitate]

The moon is certainly not small nor smooth, so the probability is so small that it can be called impossible

[@b1ackwa1tz2]

@@10pitate I had hoped scale might play into affecting the hypothesis positively. Guess you'd need to point something like one of our intergalactic telescopes at the moon to see the tiny dot? Wonder if the Vatican is down. xD

[@agdmp1188]

@@b1ackwa1tz2 I think the more important part is that it isn’t smooth, so this effect would be nearly impossible for the moon

[@b1ackwa1tz2]

@@agdmp1188 Technically we'd be using the earth as the ball- but I'd assume your argument remains valid.

[@singularitygaming4893]

probably not, because the sun is hardly a point source of light, and (all the other responses)

[@EthanKeef]

so there is a very easy way to experience this yourself without any prep work. go outside and look at a relatively uniform part of the sky(not many clouds) and try to spot "floaters". these are the small things that move around in your vision(microscopic pieces of your eye floating in the fluid in your eye). if you catch one that is round you will see Poisson's spot in the middle of the floater. hopefully I explained it well enough.

[@Tailspin80]

Is that actually true? I always assumed the cells you see are semi transparent.

[@altersami9660]

@@Tailspin80 They are not cells. They're strands and specks of protein and other matters.

[@EthanKeef]

@@JM-tj5qm it is true. I have experienced many times and encourage you to try it out for yourself. it is a very interesting phenomenon.

[@roytee3127]

!!! I have a tiny round floater that shows up every once in awhile. It has a spot in the middle of it.

[@danielbennett382]

2:47, we now know the real identity of Mysterio!

[@JuankQuinteroMejia]

LOL

[@ognjenpetrovic2577]

Jesus

[@amritas2400]

Bryt3 GOSH😂😂😂😂😂 Underrated comment.

[@adamboy2120]

ahahahahahlololoxdxdxdxdxd

[@kilroy987]

I'm a little confused. Light isn't actually going through the ball, it's just that the surface is causing interference on the light waves at the edge of the ball, causing them to scatter, and the waves that randomly converge on the center of the shadow create the point because they accumulate. Right? So that point is actually made up of light that's bent with interference, like a halo around the edge of the ball. Mistitled video!

[@titianarasputin]

And he keeps saying it over and over "light is going through the ball".

[@Imammk]

Yes and this is exactly why during solar eclipse we did not see any light from the center of the moon, although the sun is thousands of times larger and the moon can be considered smooth at that scale

[@goedelite]

kilroy987: The Action Lab is wrong in calling the constructive interference at the center of the spot a quantum effect. It is, as my comment above explains, a part of classical physics called physical optics.

[@joelapple2344]

He literally said it doesn’t actually go through it 🙄

[@titianarasputin]

@@joelapple2344 and he said that it DOES go through the ball about six times.

[@metsys7928]

2:00 - 3:22 Me trying to extend my essay to meet the word count.

[@Fck_the_atf]

Hes doing the same. But just for the 10 min mark lol.

[@stephen_boss]

Hes just tryna teach us in depth , appreciate it.

[@moneyboyok]

🤣🤣

[@chrisanderson687]

This is utterly amazing! My lazy ass physics profs in college never bothered to show me this. Incredible!!!

[@helal2488]

How to see neighbor girl through the wall *Edit: This comment has been my most liked comment in youtube. Bless you guys.

[@helal2488]

@rgtm aa no bro you see through the wall👀

[@LupeSunglass]

@@helal2488 👀

[@wic09]

@@LupeSunglass 👀

[@LupeSunglass]

@@wic09 👀

[@KogasaTatara514]

@@LupeSunglass 👀

[@mymusic1360]

He looked like mysterio when he put the metal ball up to his face 😂

[@arifhossain9751]

Well... at least the "The Amazing Spiderman cartoon series from the early 2000s" Mysterio.

[@sejalsoniashivprasad5442]

Lmfao xD

[@cardinalhamneggs5253]

The fact that this was discovered by a fish blows my mind.

[@totallynotpeace6733]

That was either the most sarcastic or the most dead "hey guys" I've ever heard

[@mscir]

Interesting. When light shines on the circular obstacle, Huygens' principle says that every point in the plane of the obstacle acts as a new point source of light. The light coming from points on the circumference of the obstacle and going to the center of the shadow travels exactly the same distance, so all the light passing close by the object arrives at the screen in phase and constructively interferes. This results in a bright spot at the shadow's center, where geometrical optics and particle theories of light predict that there should be no light at all. en.wikipedia.org/wiki/Arago_spot

[@thierrypauwels]

But you do not need quantum physics for that. Maxwell's laws of electromagnetism will completely describe this as well.

[@erazorheader]

But the reason for this is also quite clear. Light is absorbed by matter that reemits it back with the same frequency (let's forget about inelastic scattering) but in a random direction. That's why the wave front of the point obstacle is spherical.

[@RexxSchneider]

@@thierrypauwels Exactly. That's why this video has no quantum physics in it. Fresnel's equations described the diffraction effect perfectly well almost a century before Planck proposed the concept of discrete packets of energy which lead to QM.

[@craigdupree1687]

@@thierrypauwels Right. You just need light be a wave which Maxwell shows. But I think it's against some Internet Law to make a physics KZbin video that isn't about quantum mechanics, or general relativity.

[@nayankulkarni5131]

This channel really has a very very genuinely informative content. Thanks for such stuff!

[@MatheusSousaALenda]

This is one of the best channels ever. You really know how to explain things. Thanks for all your content.

[@Caracazz2]

Check Steve Mould's channel

[@migs192]

Notice that the wires also have the brightest parts in their center while the sides are "highlighted" by shadows

[@jeldrikhartmann531]

The Action Labs is actually John cena.. Proof: 1:50

[@jerry3790]

A great experiment. I’ve seen it on veritasium but this was good too!

[@JeremyEllwood]

I am a theatre lighting designer. I love light. I totally just made my room mate find me a sphere and a magnifying glass. No sphere so I made her find me a rod. Yep. It was worth it.

[@edbrown6467]

First time I've ever seen this guy. I like his approach. 👍👍

[@meesalikeu]

Ed Brown check out his vidyas he gives best explanations ever

[@tboy420]

James Charles has not kissed you You're welcome!

[@nightfury8848]

Thank you!

[@jemileedabear9630]

Reanu Keeves will kiss you before you sleep. You're welcome!

[@tboy420]

@Jesse please stop

[@jakubr2769]

Uff

[@jemileedabear9630]

@Jesse please stop

[@kaptist1900]

this guy is wha my mom meant when she said “if you keep smiling for so long your face is gonna stay like tha”

[@eddiel798]

This man explains why we can’t see his face thru a basketball... Wow! Isn’t that amazing?

[@drippy.mcflip]

My theory: The light is not going “through” the sphere. Photons are curving around the sphere and coming together again behind it, on the original trajectory line... But I’m not a rapper.

[@JackFromAbove]

You're actually correct

[@jomoist]

youre not a rapper but your theory is wrong cause light is not a wraper

[@himanshubhoria1832]

Its because of diffraction so you are correct

[@XaadeTheBlade]

That's wrong. Photons aren't curving around and coming together behind it, because you could shoot a single photon at a time and get an interference pattern (see double slit experiment). If you treat light as ONLY particles, they might curve around, but they wouldn't shoot STRAIGHT OUT behind the object. And that's what this is about. They behave like waves, but we can measure a single photon and get a position and spin just like any other particle.

[@boiimcfacto2364]

SYKE! That's the wrong theory!

[@Okaiako]

5:00 when the wire shook it separated from the ball a couple times but the magnetic field was strong enough to keep the ball on it

[@brianatharadriansyah]

okay thats cool

[@satyamverma101]

Okay, Action Lab .. This is the content I wanted from you... I mean Quantum mechanics is my favourite subject... But I have a question for you...Can you explain how light has no mass but still has momentum?..And at what speed does the equation of the special theory of relativity come into effect. Thanks!

[@ren6140]

It has mass. Inmsome laboratories, scientist with extremely potent lazers, vacuum zero with almost no friction, move an object. Another proof are black holes, as gravity has only effect on objects with mass, so the only thing they dont attract is nothingness

[@ThePrufessa]

@@satyamverma101light does have mass. It just doesn't have resting mass. You should go watch the science asylum video explaining this so you don't look stupid spreading wrong information in the future.

[@elwhagen]

I'm glad that the algorithm of KZbin showed me this video. Really cool stuff!

[@alpeshpatel3213]

Saw this on Mark Rober but he said it was because the waves were going around the circular objects and meeting back at one point

[@denumelon841]

Alpesh patel yes that is true. That’s what happens. This guy, for half the video said light goes through it. But at the end he cleared it up. He said “technically, the light doesn’t go through it. Each point on circumference of the sphere behaves like point source. Since light is a wave, these point sources constructively interfere the maximum at the Center (diffraction) and hence its brightest at Center. So it’s like light goes around it”

[@meesalikeu]

DENU MELON he did say that. yes he did.

[@TheLastOutlaw-KTS]

So he’s lying . Thanks🙂

[@Aigentcy]

Don't fall for it It's all a bunch of non flat earth bullshit

[@RexxSchneider]

@@Sodium_Slug This isn't quantum physics. It's just Fresnel diffraction and is explained by classical wave theory. Every point at the edge of a circular object casting a shadow is the same distance from the centre of the shadow, so by Huygens-Fresnel principle the wavelets reaching there are in phase and therefore reinforce each other. No QM, just simple geometry.

[@Kj16V]

0:24 Babies be like: "No, it's actually because you cease to exist."

[@HamsterPants522]

According to the Copenhagen interpretation of quantum mechanics, the idea that matter ceases to exist when not directly perceived is actually plausible. What we see as matter when we look at it is described as wave function collapse.

[@D_YellowMadness]

@@HamsterPants522 Then what are my arms attached to when no one's looking at me? And how does the planet stick together for that matter? Sounds like nonsense.

[@themechanictangerine]

@@D_YellowMadness you know they are there, you are an observer-detector so they collapse into arms. So does the rest of your body. "And how does the planet stick together? That is why some scientists believe consciousness could be a fundamental property of reality.

[@psyogisoma8819]

We got a developmental psychologist in the chat

[@Snoboi]

@@themechanictangerine that’s actually a really cool theory, despite how absurd it may sound

[@kirstentownley8916]

Yes! I’m enjoying your videos and learning so much! You’re definitely helping pique my curiosity about quantum physics and mechanics! Thank you.

[@renukakoya1798]

Your videos are good man.👍👍

[@argylewarrior1]

it's Fresnel diffraction, not light passing "through" the object. The theory was first proposed in 1818, long before quantum mechanics.

[@hugofontes5708]

8:07 I do think "shiny light past solid balls" would have been more accurate

[@hugofontes5708]

Also, gravity has been described long before Einstein, but still, relativity and spacetime curvature are a thing

[@argylewarrior1]

he spends the whole video talking about quantum theory and probability and light passing THROUGH the object, which is false. the light bends around the curvature of the object through diffraction. the process was discovered, tested, and proven over a hundred years ago. it even explains why bumps mess it up, while this video does not. there is zero reson to defend this video for accuracy, as it's premise is false.

[@tbd5330]

@@argylewarrior1 Its not wrong Yes its called Fresnel diffraction . But it could be explained by the wave theory of light , as well as Heisenberg's uncertainty Principle(quantum mechanics). Qunatum mechanics is better theory because it perdicts perdicts both wave and particle nature of light. You can explain effects like photoelectric effect and compton effect with particle theory of light but u can't explain diffraction, interference and polarization. At the same time these effects (diffraction, interference and polarization)can be explained by wave nature of light but u can't explain photoelectric effect and compton effect with wave nature. But quantum mechanics can explain all of them That's why it is a better theory.

[@zemariaperez5697]

@@tbd5330 dude you re not getting it

[@varung4436]

Action Lab: There's no ball, infront of the laser at all. Eminem: let's do a duo! 7:13

[@amritas2400]

Varun G The background music combined legit sounds like rap😂

[@varung4436]

@@amritas2400 yes 😂😂

[@MammaOVlogs]

Very interesting and very good explanation I see the light :-)

[@imeverywhere1156]

Yes my friend,if you see the light you are in the right path

[@skrt3821]

Momma O isn’t this your son

[@gormanspacemarine]

Very clever man. Your videos are very interesting.

[@arcaneraccoonart]

The Action Lab: *makes a super informative video about the behaviour of light and smooth surfaces* Me: * 7:40 haha, the graph looks like a butt *

[@cainofthejungle]

This is amazing stuff. Very entertaining. Thanks Mr. Action. Makes my brain gears turn in new ways.

[@fusionrage4210]

Poisson in French means Fish.. So.. Fish's Spot 😂

[@seko0629]

Wosh

[@yinyang1217]

@@seko0629 what no

[@sidgar1]

So what's a poison fish in French, then? 🤔

[@ev-0163]

Wow very cool, alexa play despacito

[@KenpachiZarakiX]

Illuminati Confirmed

[@aaronmurgatroyd5810]

I would more describe this as bending the light around the orb rather than going through it as a simpler way of describing it. Of course its more just that the sum of waveforms of the light result in the waveform being focused on the middle at the opposite side of the ball, but i like just saying that it bends around the ball, its easier to understand :) Great video!

[@lashamartashvili]

Why rewriting the history? It was Arago, who settled the arguement with that idea and he deserved that the spot was named after him. Btw light hasn't wavelike nature, it's a wave itself and EM field is truly waiving.

[@PaulSmith-pr7pv]

👆🏼

[@fresnelneru]

he experimented it

[@maxplaysgamez-sharesgaming1756]

7:40 I Knew It. The Answer Had Always Been Them *BUTT CHEEKS.*

[@14bqdonk]

puss shy

[@yinyang1217]

@@14bqdonk y

[@yinyang1217]

@@14bqdonk y

[@pierrosolympiakos4547]

Yesh,de answer is always da butttttttt

[@pierrosolympiakos4547]

Also kinda looks like a sack of balls

[@bashbeyondultra4388]

Im always amazed by the stuff this guy does

[@DavidplazDuarte]

Best science channel on YT!

[@80slimshadys]

Him: "the light didn't go through it, it bent around it Me:" Not gonna lie they had us in the first half"

[@PotPoet]

The light did not go "through" the ball. As it is phrased, the claim was unsubstantiated. The interference pattern that was created caused a visual effect that made it LOOK like light went straight through, but the light did not actually go through. Nevertheless, this was another informative video, so thanks again.

[@dominus6695]

so putting a piece of cardboard near the shadow, eclipsing the ball's shadow would clear that up I guess

[@vasuyadav2931]

Isn't this simply due to diffraction of light around the sphere's edges and interference pattern forming on the screen. The brightest spot is in the centre of the shadow because that is the position of the interference pattern's principal maxima. Light doesn't pass thru the centre of the sphere, it diffracts around it's edges since the sphere is small (which is a needed condition for appreciable diffraction) and the diffracted waves interfere with each other and form multiple maxima and minima with the principal maxima forming at the centre.

[@nullvoid3545]

THANK YOU! He seems to know this in the video but isint very clear with the repeated "passes right through it" comments.

[@vasuyadav2931]

@@nullvoid3545 yeah, but even in the title he mentions shining light "through solid balls" so.... idk whatever lol

[@daykeyy]

@@vasuyadav2931 It's obviously to attract new viewers who are not well versed on these types of topics

[@richardbelcourt3610]

If you were an observer at the center point of light In the shadow, would it look like to you the same diagram as Eisenstein gravitational lensing??

[@lanoche]

5:05 "LASER" reminded me of how Dr. Evil says it for some reason. I was half expecting him to be holding his pinky close to his mouth.

[@NerdyCats3]

Thank you for showing this so clearly, and making the science real.

[@GabrielGonzalez2]

I mean you could think of the zone you want to keep your opponent in as "anywhere that isn't next to me"

[@aestivial_]

9:16 all I saw was a demonic eye staring back.

[@natefilms684]

That’s frightening why didn’t I see that before

[@internetduck1114]

lol

[@worldaviation4k]

Is it like how at the airport perimeter fence where i see gaps of the aircraft but if i zoom with a camera, the fence seems to blur and go away and then i see no mark of the fence on the complete aircraft.

[@thamonster]

We're gonna not talk about how this is called "Fish's Experiment" ?

[@MangezDesPommes]

The experiment was named after the French mathematician Siméon Denis Poisson. Fish is the English translation of Poisson, I have no idea who decided It was even remotely correct to translate a proper noun... People still use it mainly because that's how they learnt it but it doesn't make it right. You should consider using his real name.

[@andrewfortmusic]

@@MangezDesPommes it’s also annoying me that he’s saying “poyson” rather than the correct pronunciation of “Poisson.” My stats teacher did the same when we were talking about Poisson distributions.

[@sittingbush]

Up next: *How to make table legs that don't stub toes*

[@MarkusDarkess]

Hang all your furniture from support ropes/ strings. Never stub a toe again. And less damage to the shins since they will move. But if it swings back before you move twice the damage.

[@thestarforger832]

Put a bunch of strong magnets in the ground in a circle, all facing a central spot with the same pole. Then put another strong magnet on the leg of the table with the same pole turned to that spot. Now repeat for each leg. You now have a floating table.

[@meesalikeu]

put table on quantum locked track - bump it but no worries no friction

[@f1rebreather123]

ultimate tm was gonna say that

[@flowerpt]

Quantum shoes! Or regular shoes.

[@shupesmerga4694]

IMO, @9:00 "the light particles went around the sphere" would be a more accurate statement. What dya think? Just like what a flowing water would do encountering an obstacle.

[@justsomerandomgamer2102]

Instructions unclear seeing god rays through earth

[@deekay2899]

Did you watch till the end?

[@joshhayl7459]

🔵 Who knew that light possessed the characteristic of surface tension like water.

[@johnlannikk2701]

Theses experiments are the best I've seen anywhere.

[@nordlyssrlys6945]

Why were there curved lines of light on the wall, those curved lines looked just like the magnetic field lines of a bar magnet, plus, when I look at a bright light, I could see the same magnetic field line like pattern of curved lines made of light... Why does this happen???

[@arifhossain9751]

They're all electromagnetic waves so it makes sense if they behave the same.

[@ThePrufessa]

All light is electromagnetic.

[@sk-tt6xf]

Schools: this is the type of spherical mirror The action lab :shining light through a sphere using quantum mechanics

[@galahadgarza6905]

What would happen if you were to set up a detector between the light source and the sphere? Would the wave function collapse? If so, what would the image being projected on your garage door look like?

[@doiron12]

It would collapse and the image would be schrodinger's cat trying to capture the dot made by the lazer pointer

[@franceleeparis37]

Reignited my love of science... absolutely brilliant... the pinhole camera is probably the coolest example of this principle.. and they discovered this hundreds of years ago...without any computers... the human brain is awesome..

[@superduperjake4193]

4:30 I have that laser and happen to know that it has a focusing feature. If you unscrew the front of the pointer, the dot will get bigger. No outside lens is needed.

[@AmosPressley]

"Okay, kids! Say the famous scientist's name with me! Sir Isaac..." "New'un!" 0:11

[@ognjenpetrovic2577]

newton + putin =newtin

[@brodylockwood14]

Same way Americans say Innernet and not the correct way, inTerNet

[@korny19989]

How many frames pr second is real life? I know real life doesnt operate in frames but... How many photons is in a streak of light that has traveled 1 second? And what would it look like if a camera had a higher frame rate pr second than photons in a streak of light?

[@elbowgrease3481]

Korny I suppose that it would be the speed of light times by the number of seconds in an hour?

[@atlas5661]

It's less than 100 billion per second. How do I know? An alien posted it online : )

[@chrys9256]

How about 10 trillion FPS? kzbin.info/www/bejne/bYrWkKyBfLN5iLM

[@THaNaS1s]

@@GabrielCazorlaPersson1Do u know if there is a limit in the fps a humans eye can spot eny difference

[@MegaBrokenstar]

The amount of photons in a beam of light is dependent entirely on the intensity of that beam. As we saw in this video, the brightness of light is a direct function of the quantity of photons reaching a certain point. As for the “FPS of real life”, the best I can come up with for that is the FPS if the shutter was to rotate at lightspeed. If the sensor of the camera was around 1cm, then the shutter would have to be at least that large in radius. At a radius of 1 cm, the circumference would be 2pi or 6.283185cm, which is 0.06283185m. lightspeed or 299,792,458 m/s of tangential velocity means that the shutter would rotate about 4,771,345,000 times each second, taking two frames with each rotation. Therefore, the “FPS of real life” is roundabout 9,542,691,000 frames per second, assuming a 1cm shutter.

[@TheWilliamHoganExperience]

I'm a sailor, and something similar but opposite happens with ocean waves and islands. you can have a large sea running and a small island in it's path, and when you get behind the island, it's calm. Go on Google Earth and you can see what happens: The waves refract around the island and when they meet, at certain points they cancel each other out. This is destructive interference. The opposite can also happen, with waves doubling in size when they superimpose on each other in certain phase states. This often happens around artificial breakwaters and steep beaches as waves reflect and reform from the opposite direction. This can range from uncomfortable to downright dangerous, as such phenomena are difficult to predict. Like you said - it's a function of probability, not a certainty.