Science Memes

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submitted 4 months ago by [email protected] to c/[email protected]

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[–] [email protected] 79 points 4 months ago* (last edited 4 months ago) (2 children)

Here's another example

[–] [email protected] 17 points 4 months ago (1 children)

That's so weird. You can stare at a pixel and go "yep that's red". Zoom in, still red. Zoom more, BOOM IT'S BLACK!

[–] [email protected] 10 points 4 months ago (1 children)

The “red” parts are white, but yeah it’s interesting

[–] [email protected] 4 points 4 months ago (1 children)

I am confident that is not correct, but every time I zoom in to test it, my brain explodes and I can't tell.

[–] [email protected] 2 points 4 months ago

I’m also lost. Because logically it should be the white, but I see a red and white striped midsection of the train and a red and white flecked can, so I think it must be coming from the black pixels.

[–] [email protected] 1 points 4 months ago (1 children)

Why is my brain making the train stripes red? I don’t know what color they normally are, which I assumed was the mechanism behind the coke can illusion.

[–] [email protected] 10 points 4 months ago

Because our brains interpret colours and shading relative to their surroundings. That specific blue is on the opposite side of the colour wheel from red, so that relative lack of blue can be interpreted by our brains as red.

Remember that white is all colours present, so white next to white will have more red than white next to blue.

You'd get a similar effect if you stare at a bright blue version of the can for a while and then look at a blank white page or close your eyes. The after image isn't the same colour as the thing you were staring at, it's the inverse of that colour.