Flashlight White

Suppose two flashlight beams shone on a white screen, through a blue glass panel and the other?

through a yellow glass. What color is displayed where the two beams overlap? Suppose instead that the two panes of glass are placed in the beam of a single flashlight. So Why?

Firstly: White, this is an additive color system, because the colors of light layers ontop of each is, another is white because: Yellow = Red + Green, Blue = Elementary, so Blue + Yellow = Red + Green + Blue, which are the 3 primary colors of light, so you get white. Second: Green is a subtractive color system, so from white, remove everything but the blue, then get all the blue, but yellow. So I'll stay with Green, which are the wavelengths the light shared by both filters, however, if the filters were perfect (ie, only allowing the passage of pure blue and pure yellow), then you get nothing light!

Flashlight White

Flashlight White