😂😂😂

ههههههه

Man I am just bursting in the middle of the night

haha well done

xD

Signs of a good teacher

Yes.. that's such a great quality 👌🏻👏🏻💫❤

I think he has a degree in educational science or something

@@inferious777 yes, you are right. He's got a PhD in science education. :)

He doesn't run around and desert you

Hmmmmm 358 likes with no replies? Let's fix that

Exact opposite of Socrate's method LOL

It's close, but I don't think it's quite the Socratic Method. Socrates would ask super basic questions carefully crafted to help guide a person to making the logical jumps that help them arrive at a specific conclusion on their own. Derek simply encouraged her, saying that she *does* know and isn't engaging the part of her brain that knows the answer. That was all :P Still awesome, though! I really appreciate how he encouraged her to get it on her own :)

@@dismalthoughts Only difference is that Socrate will bring you to a contradictory result, so you realize yo don't know.

​@@witherschat Haha, yeah, the moment of "metanoia". Socrates' goal was still to ultimately guide the student to some higher truth, but often that first requires tearing down contradictory, indefensible beliefs, which he accomplished with deceptively strategic, seemingly mundane questions. The goal is Truth, but it requires first getting the person to realize their current ideas are indefensible and admitting they don't know (or at least that they haven't yet consciously realized). Actually, now that I think about it, I think this *was* the Socratic Method (just a gentler version than is typical lol). Socrates' first step (1) is to ask leading questions that lead you to "metanoia"--to realizing you don't know. Derek absolutely did this by asking people what they saw and what they thought was going on, occasionally helping them realize on their own (through strategic questions) when some of their ideas were erroneous. Socrates' second step (2) is to help you reach objective Truth (again on your own). This is where you could argue Derek *didn't* complete the Socratic Method since Socrates would accomplish this with more questions (this time not to erode belief but to help the student make connections) while Derek simply cheered her on lol. But he clearly completed step (1), and I think cheering her on still at least halfway counts as (2) helping her reach objective Truth on her own :P So yeah, my mind's changed lol. This was, in my view, a fantastically elegant and (possibly more importantly) refreshingly softhearted implementation of the Socratic Method :) Socrates got himself killed with how abrasively he employed his method. Derek used it to cultivate--not just knowledge, but--inspiration and goodwill :D Socrates would be beyond proud :')

So he recorded this with his watch? Oh, that explains blurines.

@@DisiKleep b r u h

U tried pulling something there

lol

OP I'm afraid you're about 8 months too late, there's another year old comment with the same joke with 3.4K likes. I am sorry for your loss.

Video was made a long time ago.

@@Soul-zj3wi yet KZfaq recommending it now😆🔫

@@morning5tarr yes, KZfaq is smart 😂

@@iKraigory LOL😆🔫

i guess it's not as out of focus as it appears... the shaddows ae simply blurry

my thoughts exactly.

I think it was focused on the wall, but because the shadows naturally have fuzzy borders and the hands are also blurry because they're out of focus, it gives the impression of the camera not being focused at anything.

Noob cameraman

Yeah

I figured the camera guy was just stoned pressing all the buttons he could.

Exactly

I was squinting whole video...

what's myopia

@@cbhv4321 nearsightedness

I have myopia I can feel your pain

2:15 according to this explanation, the sun is triangular

@@jazzabighits4473 When the card is close to the wall, you will of course see a triangle, because the rays coming through the triangular hole have not converged yet.

JAJAJA

@@avhuf right

Or a bigger triangle will project a triangle on the wall

If you know the physics behind this, then you can be certain :-)

Right

@@百合仙子 And you can also see the camera not being in focus as an hint in some wait too ! :3

Definitely he is not doing majic with his team to tell lie. So trust them

Well, go cut a hole in some paper tomorrow and try it out.

***** Wait, did you just taught by me?

***** My job here is done, it looks like

+PattyMMelt haha

i agree that was awesome!

Maybe. Cleverly edited this woman's voice at the end though kzfaq.info/get/bejne/os-heZl2xtPNdWg.html

That was funny. I just barked a weird abrupt laugh.

Me too

Come on man!!! Don't be so mean 😂😂😂😂

I had to read this twice to get the pun

This is Funny Comment 😉

i think you'll find its because of the shape of the leaves lol

I had serious doubt that his explanation was correct, and you've just confirmed it to be true. Thank you

@@samsibbens8164 :) 👍

@@anonymous3658 makes total senses 👍

this comment reminds me of that thing some games do where it says something like "press *triangle* 🔺 to enter", as if the user doesn't know what a triangle is

PAÐÐY ... lol What :DD

LOL hilarious comment!!!

Same here

Lmao just realized. I thought it was uploaded today :v

lol same here

same here :p

Same!

She was so close 😂

LOL!

😂🤣

To be fair it's not like the cameraperson could use autofocus in this video, as there were two different depths of field that were constantly being interchanged as warranted. A great deal of time was spent focusing on the background image of the pinhole shadows while the people in the foreground were still taking up a large proportion of the visible frame... it's not possible to keep both fields in focus at the same time. The only workaround would have been to have everyone stand directly next to the wall. This wasn't practical because of the lack of physical space while simultaneously trying to hold the cutouts far enough from the wall to focus the pinhole's projected image. It's an either/or situation. Because the autofocus was out of the question, many times when switching back to the foreground image it was momentarily out of focus until manually readjusted. Compounding the problem was that many times the "man on the street" was holding the cutouts, & the pinhole shadow on the wall was, itself, also unfocused. So trying to focus on something that's already blurry while constantly swapping to and from the foreground manually was pretty untenable and I'm surprised it wasn't worse. The camera equipment typically used for Veritasium videos I'm sure doesn't have a real-time slider control to pull focus either... It's probably an up/down toggle situation. Summarily, I don't think drugs were the problem, but if you have any let me know. :P

@@chriscornelius6669 your sense of honour is the problem

@@moneebkhan3744 I was scheduled to fall on my sword tomorrow... 🤪

matszz If you Google: pinhole camera inverted image and select Wikipedia, it has an explanation and a pic showing the ray tracing of light.

Noted

Not a reply..just a comment for those that also wonder:. To get a "better/alternative" explanation look up "camera Obscura" this is "in essense" just a very primitive camera/projector Best regards

O>|

@@astrocopter don't poo here goto wc

Did you forget this was in 2011? Chances are you weren’t even born yet. Actually kids born during the making of this video would be close to 10 years old.

@@topsecret1837 Chances? They are the chances? I don't like those odds

@@topsecret1837 ah of course because there were only 240p cameras in 2011

@Avocado Toast What the hell are you guys even talking about? It has been completely possible to film non-blurry stuff for many many decades. It was 2011 not 1911....

I remember that. During the Eclipse, we had a telescope sitting outside of our science center. It was pointed at the sun to act as a camera. You could watch the projection wane.

@@kutsen39 i remember walking a tree lined path i walk daily and the shadows from the leaves were all crecents. it was so crazy. We were already watching the eclipse so the day was already crazy but it made me think about how religions start.

That's what I was thinking! I wish I'd taken a picture of the leaf shadows a couple years ago.

❕

Yes this is one of the ways how to spectate eclipse safely

True

@@curiousmolar8104 lol ikr. I'm sure if he did a similar video today it would be much better quality

Ezra Levy hehe

yep it's really frustrating

@@shreksthongg These days he makes video on how black holes look like, not how a tiny hole on a cardboard, LOL!

Prog47 the shadows are actually blury in case you didn't notice

Gabrol these people have never heard of light Diffusion?

Gabrol And because of the blur you can't see much but circles.

+Prog47 Haha, I think the footage taken was also out of focus. The camera men didn't know how to focus the camera as well. And the shadow is also blurry, making it very very blurry.

+David Beczuk the video itself is out of focus.

That's the one this reminded me of!

I learn something new every day :)

Really just strapped a go pro on a random drunk dude and used the footage

Yeah now try this with a laser....

I thought the same. 😂

oldcowbb what is your country?

Lemme guess you’re either Chinese or Indian

I was guessing dubai

@@YOLO-sp5bi Here you go: kzfaq.info/get/bejne/j7SFhqSF1a6zoWg.html

🙋‍♂️🙋‍♂️🙋‍♂️

Cucuma

Myself bro👍

🙋‍♂️🙋‍♂️🙋‍♂️

Meee

This was filmed in 2011 mate

Tell me how to get a sharp image of a blury, fuzzy shadow?

@@robertserban2008 thats not what im talking about look at 0:50 he zooms in at doesnt focus im not talking about focus on the shadow brudda im talking about focus in general

@@internet_typer and btw im pretty sure focus was present in 2011 DSLRs cuse i have one that was built in 2010 and it has focus Manual and Auto

@@dulla8469 I am also pretty sure even laser focus is present nowdays, and still some very well known youtubers, who are using them, have some problems focusing.

I'm going to back in time eight years and make the perfect video. They'll never expect it

@@Slayer1111111111able Nah, it was easier to just bait up all my thumbnail on my old vids

Hehe I get the reference 😂

@@Slayer1111111111able I see this one year later 👀

I think people are just using special sunglasses...

Soulmaster187, he's referring to the technique where you place a pinhole in a piece of cardboard. You can then hold it up to the sun and observe without it destroying your eyes. The pinhole lets the scene you're observing come through, but it's much more dim. Like the first hole and second hole in this video projected at the same size but the smaller hole was much dimmer.

I don't think that will protect your eyes, but it is neat to observe that the light from the pinhole will look like a crescent/chipped circle during a partial eclipse.

Unless you're the POTUS and then your eyes are invincible.

You can view an eclipse without a pinhole camera (but only if it's a total eclipse- and maybe double check before trying it and don't just trust me :P ) Also I don't think the pinholes for observing the eclipse are just held in front of your eyes. Usually they're made to project the image onto a piece of paper or cardboard or something, and that's what you view, otherwise you're still staring directly at (a small portion of) the sun

Yeah my mind keeps going to the out of focus triangle thing, and I’m having a hard time understanding why the triangle makes a circle if it isn’t because the blur of the light makes it look circular

@@dylanv3813 It would be the blur of light making it circular (lack of focus). But like at 2:15, when he puts the paper near the wall, you see it makes a triangle. The sun isn't triangular lol

Tricksy sun!

Cheat Code shadows are always blurry tho, and he’s focused on the wall.

Dude this video was literally 8 yeas ago

@@ocea3237 Just noticed it . Was on my recommended . But no matter how old it is bro dont you feel that the whole purpose of the video is defeated due to that camera man ? F

The autofocus will just get confused. Autofocus is designed to focus on foreground object that are expected to be fairly sharp, not on blurry shadows. You'll have much better result to go manual and preset your focus level. Just keep yourself at a set distance from the target rather than trying to play too much with the focus.

@@yvrelna *sarcasm*

Yeah, but if they showed the actual size in the thumbnail then we wouldn't have any idea what we were looking at

A close-up zoomed shot of a small card with a small hole and it’s shadow could have shown both the hole and its shadow in focus, giving proper context. In the thumbnail the blurred area around the circle isn’t even large enough to produce the shown effect.

I always dislike and unsub from channels that do clickbait

This is probably why this video is getting recommended 8 years later. He changed the thumbnail recently (as per one of his recent videos highlighting the youtube algorithm), and it's getting people to click on it.

Jason Klugh Alright then, disliking the video in hopes they learn better. I used to trust Veritasium but it sure does seem like pandering to the algorithm is taking precedence over quality educational content lately.

99% about the video 1% about comments about the video

99.85% about video, comments and comments about the video 0.15$ about comments about comments about the video

no

Bro

How are you here too 🙄 ... Did you find a way to know which videos are recently showing in others recommendation 🤔

Pls change your pfp, you could do better

damn....I didn't expect you to be here too!!!

Lyapunov Exponent you made my day sir, thank you very much!

Thats what I was thinking until he blurted out the answer

Oh if it was a blur, it'd have still been a triangle, just blurred. Edit- you can approximate the ratio between size of sun versus distance from earth by measuring the length of shadow gradient (not a term) from an object at a certain distance from a wall.

@@me.unpredictable280 well they didn't see triangle on the because the hole of triangle on the paper is so small that the light rays diffract sense resolution is lost. That's what he called blur

@@vrajpatel2881 mathematically, if the shape of triangle in hole is visible, no matter what you do, until luminosity is enough so the see the light in screen and source isn't converging there is no way you won't see a blurred triangle if diffraction is what is happening. Also, I am talking about a hole visible to naked human eyes.

I think this is what NCERT CLASS 12 Part 2 says! I guess?

By the way, where are you from? Your acsent doesn't seem Indian

@@abhishekwaghmode8190 yes it is. And I am an Indian.

Yo , i was searching the comments to see if anyone thought of diffraction like I did ..

@@glkglkglkglk9193 Yeah XD

@@rushikeshkarandikar4343 Why isn't this diffraction? 🙈

Speak for yourself, despite being raised at a Lutheran school till 8th grade I know I've seen this model at least once growing up in addition to inside a Highlights for Children magazine. Then again I remember Square One as well growing up.

And Vsauce!

Well, Veratasium doesn't exist thou 😂😂

@jabberwolf Lol just a piece of show off 😂

Think about it this way. The hole is so small that only, say "one ray" from each part of the sun can get through. Since they are all coming from slightly different directions, they pass through the hole and emerge inverted on the other side as an image. It's basically acting as a lens.

Also, meant to say 90%, not 890%

charlesburton95 There's an edit button...use it.

KZfaq Comments Suck hehehe

d

That's a lot of years, wow, where has the time gone?

U can stfu up now that coment is so burntt

Stale comment

ShadowVipers it's only fitting for a stale video 🤷🏼‍♂️

Or a crescent *sun* shape!

That's sad. Also, I love your Avatar picture!

If you bring it closer to the surface it will show the shape. Like focusing the camera

@@vinyak123rohatgi Actually that is losing the focus which is why the projection is no longer discernable any more, there is an ideal diameter for the hole for a target focal length d=2*sqrt(f*λ) where f is the focal length and λ is the wavelength. Use a wavelength of 550nm (Yellow-Green) for visible light as this is nicely centred in the middle of the visible spectrum.

Only a point type source can make it to be a perfectly triangular image. Everything else will be a triangular image with circular edges radius of which keeps increasing with distance from the cardboard to wall

@@vinyak123rohatgi Only a point type source can make it to be a perfectly triangular image. Everything else will be a triangular image with circular edges radius of which keeps increasing with distance from the cardboard to wall

@@seraphina985 Only a point type source can make it to be a perfectly triangular image. Everything else will be a triangular image with circular edges radius of which keeps increasing with distance from the cardboard to wall

rutramp yes. Actually during a partial solar eclipse, the sun has the shape of a sickle or an Apple with a bite taken out of it, and you would see that in this experiment.

rutramp yes, just look at this solar eclipse /watch?v=EQQByou74TY

You grown a whole year since this comment

@@executorarktanis2323 comment still holds true

@@jasondeng7677 fact

@@jasondeng7677 a strong will and determination still stayed with you or even grown stronger

What I saw is cdn. ebaumsworld. com / mediaFiles / picture / 2183782 / 85046402. png

How about a tetrahedron? That is not flat and seems triangular from most perspectives. Anyway, my point was that a triangular light source would leave a triangular projection through a small hole, regardless of the hole shape.

I know that XP I don't tell my imagination though. It sometimes comes up with cool things, so I wouldn't like to limit it via physics.

it is not possible , every thing in this universe wants to be a sphere thats cuz thats the lowest energy possible !!!for any thing!!

The sun should be a cube like in Minecraft!

***** Lol, true!

yeah wtf youtube?

Same

2021 algorithm too

The cause of this is because the sun is not a point source. The sun is a disc about one half degree in diameter. As you move the paper away from the screen you will notice that the edges get fuzzier and fuzzier. This is the PIN number or the area that is only illuminated by part of the sun. The bright center of the hole is limited by the entire surface of the Sun and the darkest part has no illumination from the Sun. When the hole is small relative to the distance to the screen it approximates a pinhole camera and you indeed to see an image of the sun.

We have to consider following points to understand the phenomenon 1) If the light source(sun) is point type, then in this case, we should see a triangular image for a triangular hole in cardboard. And , the as distance between card board and the wall changes, the triangular images size nearly stays same since sun’s distance to cardboard is very very large compared to the distance between cardboard and wall. (Distance from Point type sun to cardboard)/(size of hole on cardboard)=(Dist. from sun to wall)/(Size of image on wall) To double the size of image , we need to make the distance between cardboard and wall same as distance between sun and cardboard 2) If the hole is point type,i.e., a pinhole, we should see the inverted image of the sun. And, as the distance between cardboard and wall varies, we get varying image diameters of sun accordingly to the following formulae (Dia of sun)/(Distance between Sun and cardboard)=(Dia of image)/(Dist. b/w cardboard and wall) Combining points 1 & 2,we get a situation where we have multiple pinhole images side by side across all the points on the triangular holes image

Video's only 8 years old. Hopefully he'll learn once he gets more experienced making videos

oh common. that shadow was blurry. that's why the camera is struggling to focus

The sun made an image without focusing... Why can't the camera?

You are thinking too hard. Go back and look how a pinhole camera of an eclipse works. The rays are not parallel.

+Carlo Tognazzo Do it during a partial solar eclipse and see what happens.

+Carlo Tognazzo he is not wrong. this is not just an area shadow. it is blurred a little bit (like an area shadow), but it is also acting as a pinhole camera like he said in the video, and a pinhole camera will work with non round apertures.

You have to check out what shadows looks like during an eclipse, just google: "shadows during eclipse"

Excellent way you were looking at things, sir. I'd really appreciate if you messaged your comment to Veritasium.

Nope. The shape you get on the wall is the convolution (A⊗B) of the shape of the light source (A) and the shape of the hole (B). If B is a pinhole, you get an accurate image of the light source A. And if A is a point light source, you get an image of the hole B. Here's a counterexample to your challenge. If both A and B are very thin lines, the resulting image will be a sharp edged parallelogram whose sides are parallel to A and B. There would be 2 special cases: 1. A and B are parallel: Result is a thin line that fades (blurs) towards the ends 2. A and B are perpendicular: Result is a perfect square.

keep blurring out and you will reach a radius aka circle structure because of what blurring is

orbik Does that mean the projection of the sun at the wall only works if you can approximate it with a dot? Basically any hole that is small compared to the shadow? And i'm not that familiar with convolution in 2 dimensions, would a round light source just make the corners of the whole appear to be round? And basically not change long straight lines?

Florian Brauchle Hmm, I'll try a more detailed explanation. A shaped hole can be thought of as an infinite collection of evenly distributed pinholes (zero diameter). Each of these pinholes makes an accurate image of the light source on the wall at a position determined by the hole position, and when summed together, they combine to create what you see on the wall. At any point on the wall, the brightness of the light depends only on how many of the (pinhole) images overlap at that point, often it's all of them at the center and very few at the edge. But if the light source and hole shapes are thin (zero width) lines, and not parallel to each other, the shifted images wouldn't overlap at all so the resulting shape on the wall would have constant brightness, i.e. no blurring. Of course the widths must be more than zero to allow light to go through, so there's always some blurring.