Color Theory - RGB Monitor?

Question

If you have an image on a RGB monitor that is primarily Red is it reflecting only Green and Blue visible light? True or False. Please explain why this statement is true or false.

Thanks!

Answer 1

when light is reflected color combination are subtractive so all colors make black
when light is radiated (as from a monitor) color combinations add so all colors make white. In this case and red is almost all red (actually magenta+) and red+green= yellow.
see http://en.wikipedia.org/wiki/Color_theory