Courtesy of Rhett Allain
But what about the colors of a video projector? It essentially does the same thing. However, instead of a bunch of tiny RGB lights, it projects the RGB colors at different locations on the screen.
Project the color black
Now we’re ready for the fun stuff. How does a projector project black light? Black light would be the absence of any light, as we saw previously. How do we manage not to plan anything? Let’s first consider a screen like a television. If you have three small lights (red, green, blue), you can create a small black dot by simply turning off the three color lights at that location. Boom, it’s black!
So, is it possible that you just turn off the projector to make it dark? This can’t be true, can it? If that were the case, you wouldn’t be able to tell the difference between a projected black color and the screen without the projector even being turned on. Yes, that’s exactly how it works.
Check it out: In the following image, I’m projecting a slide that’s half black and half white. The slide takes up most of the screen.
