MaximRecoil
Well-known member
The screen of a CRT is not black when turned off (especially the older ones, which were light gray). For the RGB color model, black = zero levels of red, green, and blue, so that would mean that no electrons are exciting any phosphor when black is called for, right? Which is the same thing that happens when the monitor is turned off; so why don't you just see the gray color of the screen instead of black?
Similarly, how does a film projector display black on a white screen? Anything black on the film would be opaque, right? So if no light can pass through the black areas of the film, shouldn't that leave the screen white? Black of course, is not a color, but rather, the absence of light. Projection is a means of "throwing light". The idea of "projecting black" would seem to be oxymoronic.
Similarly, how does a film projector display black on a white screen? Anything black on the film would be opaque, right? So if no light can pass through the black areas of the film, shouldn't that leave the screen white? Black of course, is not a color, but rather, the absence of light. Projection is a means of "throwing light". The idea of "projecting black" would seem to be oxymoronic.

