optical illusion

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Witness
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Re: optical illusion

Post by Witness » Fri Apr 05, 2019 12:42 am

Image

Fix the central point, then move farther/nearer.

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Pyrrho
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Re: optical illusion

Post by Pyrrho » Fri Apr 05, 2019 12:55 am

That is a 2D Rick Roll
The flash of light you saw in the sky was not a UFO. Swamp gas from a weather balloon was trapped in a thermal pocket and reflected the light from Venus.

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Pyrrho
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Re: optical illusion

Post by Pyrrho » Sat Apr 06, 2019 8:45 pm


The flash of light you saw in the sky was not a UFO. Swamp gas from a weather balloon was trapped in a thermal pocket and reflected the light from Venus.

shuize
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Re: optical illusion

Post by shuize » Sat Apr 06, 2019 10:50 pm

Bruce wrote:
Fri Feb 09, 2018 4:34 am
Best new one I've seen in a long time.
Image
Can be spinning left or right.

Once your brain locks onto one direction, it's really hard to switch to the other. Try closing your left eye and right eye back and forth. You'll eventually see both.

The one turning counter clockwise has a better rack.

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xouper
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Re: optical illusion

Post by xouper » Sat Apr 06, 2019 11:20 pm

Here's another link to the same animation:
https://gfycat.com/likelyfaithfulabalon ... ppy-aww-ok

In addition to each ball moving in a straight line, there's another interesting mathematical relationship in there.

A pair of balls on opposite sides correlate to sin and cos, where the two balls travel orthogonally to each other (that's 90 degrees to normal folks). When one ball is at the center (0,0) the opposite ball is at the max, either (1,0) or (-1,0), and vice versa, thus if one ball represents the sine, then the other ball is the cosine, or vice versa, depending on which side of the railroad tracks you were born.

As demonstrated by this animation:

Image

Of course all that is already obvious to anyone familiar with the theory behind the Fourier Transform. I am, of course, referring to Euler's Formula.

Fourier Transform:
Image

And then substitute Euler's Formula:

Image

Easy Peasy. 8)

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Bruce
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Re: optical illusion

Post by Bruce » Sun Apr 07, 2019 4:14 pm

shuize wrote:
Sat Apr 06, 2019 10:50 pm
Bruce wrote:
Fri Feb 09, 2018 4:34 am
Best new one I've seen in a long time.
Image
Can be spinning left or right.

Once your brain locks onto one direction, it's really hard to switch to the other. Try closing your left eye and right eye back and forth. You'll eventually see both.

The one turning counter clockwise has a better rack.
That's part of the illusion. The one spinning right has more left boob exposed, and conversely, the one spinning left has more right boob exposed.

If you master your own perceptive capabilities, you can make both boobs fully exposed.

If you figure that out, teach me. :)
Such potential!