P3D Re: Colored shadows

[roberts@xxxxxxxxxxxxxxxxx (John W Roberts)]

>>Isn't a shadow supposed to be black even if cast by colored lights?<

>Well, yes and no. If there are several lights of different colors in
>different positions, they will tend to "fill in" the shadows with their own
>color. Lots of different colored lights could conceivably create a virtual
>kaleidoscope of colored shadows.

And while wearing the colored glasses, each shadow is "invisible" to one
eye. 

(What are the philosophical implications of invisible shadows? :-)

John R


------------------------------