The Snack called Colored Shadows
http://www.exploratorium.edu/snacks/colored_shadows.html does not use a
white light, but rather shines colored lights on a white surface. Perhaps
if you re-read the what's going on? section you will get more insight into
what's happening and why, and be able to form hypotheses to answer your
> Overlap white light and red light and cast a shadow of an object. One
> of the shadows
> appears green. How is this occurring?
> Also, as the three colored lights are added, aren't you adding
> brightness so that
> white light appears from this luminance increase alone?
> Paul K.
This archive was generated by hypermail 2.1.3 : Mon Apr 24 2006 - 11:34:49 PDT