Thursday, May 13, 2010
The one at the end of the hall is longer than the one in the foreground, right?
Wrong! Get a ruler and measure each one. On the computer screen, they are exactly the same length.
Yes, your brain is lying to you. Isn't that amazing?
For an explanation, check this out. The explanation by Phil Plait also describes the illusion of why the moon looks so huge on the horizon.