Tell me why? You can repeat this experimental at home. (Strange light...)



This is a light experimental I have done at home.
Where is the green light came from when red film cover 2/3 white lilght?
Don’t tell me there is visual fatigue, because my camera don’t feel tired.

And, another strange light is come from another way:
Soure:


Why?

This might help explain a little. It was just a short article but kind of explains the jist of it. http://www.pa.uky.edu/~sciworks/light/preview/color4aa.htm

-Dichroic Glass
-Dichroic Glass Film
-Dichroic Glass Finishes (3M)

that’s really cool, I hope I can replicate it for school.

how about your results?

It has to do with subtractive (CMYK) versus additive (RGB) color. As you know, “white” light is an even distribution of color. If a narrow beam of light strikes a “green” surface which is not reflective (which would simply bounce the white light, overpowering this curious effect), the “green” surface will absorb the G component while allowing the remaining colors that were not absorbed, RB, to continue traveling to another nearby surface. It will appear to be magenta or cyan.