Re: physics trick

From: Michael Lorrey (mike@datamann.com)
Date: Mon Jan 22 2001 - 10:27:49 MST


denis bider wrote:
>
> Suppose we have two canvases, each 100m x 100m in size. We also have two
> LARGE buckets of paint; we shall call these color1 and color2.
>
> On the first canvas, we paint square tiles of alternating color, each square
> being 0.25m x 0.25m in size. I.e., the first square has color1, the second
> one has color2, then color1 again, and so on until we paint the whole
> canvas. After we're done, the canvas should look like a chessboard:
>
> HOHOHOHOHO
> OHOHOHOHOH
> HOHOHOHOHO
> OHOHOHOHOH
>
> On the second canvas, we paint a balanced mixture of color1 and color2:
>
> XXXXXXXXXX
> XXXXXXXXXX
> XXXXXXXXXX
> XXXXXXXXXX
>
> Then we hang both canvases on something large and remove ourselves far
> enough away not to see the individual square tiles on the first canvas. What
> is the perceived color of the first canvas? What is the perceived color of
> the second canvas? Are they the same?

Depends on what you mean by 'balanced mixture', and upon the colors used
and their individual positions on the CIE color charts.



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