If you have to pee STOP before 1:10

BRB

Not really the definition of optical illusion... this is just a demo of the optical properties of water.

burn it!

BOOOOOOO! Semantics be damned ya frikkin' pervert!! Double-boos for all the geeks who up-voted his smarmy, holier-than-thou comment , ACT-TUALLY.

...yeah, and people abuse that word above in caps in a written sentence or while speaking should fucking annoy the shit out of anyone with a clue as well)

It's called stick-up-ass syndrome, get over yourselves already, yer too smart by half.

???

Not sure if you're serious. If it means that much to you then okay, it's an illusion...

Yeesh.

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I'm pretty sure the above poster never even used the word "actually", the word that apparently so upsets you.

Indeed, boo to anyone with a grasp of both the English language AND science.


Seriously, hoping your joking Ching, Mike's post was exactly my first thought watching the clip. Optical illusions are supposed to be things that trick your brain into misinterpreting a scene. In this case, the scene is being interpreted completely correctly, and the trick is in the physics, not in the brain. It's not a trivial or even obscure distinction to many.

I got $10 that says he's drunk.




...sucker bet.

And just to back up Chingy...

il·lu·sion

iˈlo͞oZHən/ noun

1. a thing that is or is likely to be wrongly perceived or interpreted by the senses.
"the illusion makes parallel lines seem to diverge by placing them on a zigzag-striped background"

The arrows are being incorrectly perceived. Why they are being perceived that way is moot.

WAIT A MINUTE--

Light BENDS when you look at it through water, especially water inside a cylindrical object???

I wouldn't have believed it if I hadn't seen this optical illusion in action.

Mind. Blown.

Next thing you'll tell me is magnets work through some kind of force other than magic.

From Wikipedia:
An optical illusion (also called a visual illusion) is characterized by visually perceived images that differ from objective reality.

That means when you stare at an object DIRECTLY, you are tricked into believing that it has different qualities than it does.

In this example, you aren't starting at the arrows... you are staring at a diffracted image of the arrows. The diffracted arrows REALLY do point in the opposite direction. There's no illusion here.

Consider this...

If I put a rose-tinted pane of glass in front of the arrows, would you consider that an optical illusion?

Would you think "Hey, those arrows were on white paper before, NOW the paper is pink! Mind blown! Optical illusion!'?

No, you understand that you are seeing the colour pink because that's the property of the pane of glass IN FRONT OF the white sheet.

If you put a white sheet in front of the arrows, would you think: "Hey, the arrows have disappeared? Optical illusion!"?

No, that's the property of the sheet in front of the arrows.

And so on...

Hopefully, that clarifies it for you...

@MichaelL, dude, it's only a personal pet-peave of mine, please take anything I spew with a grain of salt. The comment you made caused my brain to rumble and flex a bit , and that's always good thing. I was speaking to a certain personally-perceived pretension which I address here (and that not infrequently and wholly unsolicited), and for that, I apologize if it ruffled feathers which incidentally, are worthy of ruffling if they be but feathers.

@ Payback, guess I'd owe you $5 had I taken the bet, correct by half, as I am often at least 1/4.

@bcglorf.....now THERE's the pretentious statement I was looking for. Dost thou assume incorrectly sir or madam that I have some retarded grasp and disrespect of both science and the English language????

We think so and as often, this is the ACTUAL case, ACT-UALLY!!

@lucky760 We're both on the same page with the magnetic phenomena.....
wizardry or some other unseen forces-only possible explanation.

Great post mintbbb. It contained absolutely no human tragedy or catastrophe and no fluffy creatures doing cute things. Nice change 'o pace

I'm in total agreement with @MichaelL. Strictly speaking, this is definitely not an optical illusion by virtue of the fact that it is not an illusion.

You're just seeing objective reality the way nature is presenting it to the universe and the same way everyone else sees it. It would only be an optical illusion if it physically existed one way but your eyes/brain perceived it a different way.


It'd be like turning on a light in a dark room and declaring it an optical illusion that everything is illuminated because the photons from the light source are making everything look bright, but in reality it's all dark, so: optical illusion. "The room is being incorrectly perceived because it's actually dark, but you're perceiving it as bright."

Yeah, no.

Yeah, no worries. On the Internet, you're never sure who's just yanking your chain and who's an intellectual midget.

Your examples are flawed.

Place a rose-tinted glass in front of someone, and they would think you've placed a rose-tinted glass in front of them. The would expect the image transmitted by the glass to be rose-tinted as well.

Place a white sheet in front of them, and they would think you've placed a white sheet in front of them. They would expect to see a white sheet.

Place a clear object, such as a drinking glass, in front of them, they would think you've placed a drinking glass in front of them. They would expect to see through it, maybe expecting a perfect image, maybe a distorted one.

Fill that glass with water, and they do NOT expect to see a reversed image. It's an illusion. The arrows are not faced right, they are faced left, but they SEEM to be facing right.

By your yardstick, a mirage, the most common form of illusion, isn't.

Whats cool is that a glass (filled) cylinder flips the image perpendicular to it's length, but a glass (filled) ball flips it left to right, and up to down.

I am tired of debating stupid people... you win, it's an illusion.

Moving on...

This is the same as calling an image through a magnifying glass an optical illusion. It's no more an optical illusion than the light bending through the lenses in your eyeballs.

Incidentally, this also has got nothing to do with the brain, and isn't art.

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Sheesh... if you listen to Styx you would know it's all a grand illusion

Wow. You get told to "go fuck yourself" a lot, don't you?

In case you've ever wondered why, the problem isn't with them.

Thanks to mintbbb for sharing my video.

When the arrow is moved to a particular distance behind the glass, it looks like it reversed itself. When light passes from one material to another, it can bend or refract. In the experiment that you just completed, light traveled from the air, through the glass, through the water, through the back of the glass, and then back through the air, before hitting the arrow. Anytime that light passes from one medium, or material, into another, it refracts.

Just because light bends when it travels through different materials, doesn't explain why the arrow reverses itself. To explain this, you must think about the glass of water as if it is a magnifying glass. When light goes through a magnifying glass the light bends toward the center. Where the light all comes together is called the focal point, but beyond the focal point the image appears to reverse because the light rays that were bent pass each other and the light that was on the right side is now on the left and the left on the right, which makes the arrow appear to be reversed.