mirrors, mirages or for real?

J

Jake the Dog

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it's true:

grey.jpg
 
as it's a jpg, there's some colour interpolation ands ad such there are a few places where the colour differs however, take several samples and compare the results. photoshop tells me 7 out of 8 samples are the same colour.
 
ugh. should have proof read what i typed.

as it's a jpg so there's some colour interpolation and as such there are a few places where the colour differs. however, take several samples, compare the results and you will see it's almost identical. photoshop tells me 7 out of 8 samples are the same colour.
 
I see several think-games like this in Cognitive Neuroscience. The "Visual" system is especially tricky. Although I love them, sometimes I find them frustrating! :D
 
Here's the answer if anybody's interested. :)
pic98_answer.jpg

Message # 46
On Sep. 24, 2001 - 9:35 pm Yani wrote:

OK Here goes...

Use the background squares as our basic unit.

The light green is 8 suqares
The orange is 7 squares
The green triangle is 5 squares
The red triangle is 12 squares.

This means that the total area is 32 squares. (33 squares in the bottom image with the extra square.)

If the top triangle (it is not realy a triangle)was formed
with perfeclly straight lines then the area would be 32.5
squares. But is is not.

Why is it not a triangle?

The longer edge (Hypotenuse) of the green triangle is steeper than the longer edge of the red triangle. This causes the red/green join to poke out slightly in the top triangle and to poke in slightly in the lower image. This makes up for 1/2 a square in each image.

To conclude

Top image = 32 squares
Bottom image = 33 squares
Perfect triangle (with straight edges) = 32.5 squares.
Click to expand...
quote from here.
 
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