Re: [Phys-l] An Unsolved Color Problem

[Michael Porter <listmoe@gmail.com>]

On Jul 17, 2007, at 9:13 AM, Bob Sciamanda wrote:
> Again using Photoshop (or some other such program) one can crop this
> picture and produce two sub-pictures, each of which shows just the
> square A or the square B, without their surroundings.  Viewing these
> two pictures side by side, one sees that they are obviously the same
> shade of gray.

If you're into Photoshop, here's something else you can try. Select a  
small area in the top square (e.g. a circle around the letter A) and  
then create a new layer with that circle. You can then move the layer  
down until the circle covers the letter B in the lower square. You  
won't be able to see the edges of the circle because the grey levels  
are the same.

Mike
---
Michael Porter
Colonel By Secondary School
Ottawa, Ontario, Canada