Courtesy of Rat Allen
But what about the colors of the video projector? It basically does the same thing. However, instead of a bunch of tiny RGB lights, it projects RGB colors at different locations on the screen.
black projection
Now we're ready for the fun stuff. How does a video projector remove black light? there will be no black light Any Light, as we saw earlier. How do you project nothing? First, let's consider a screen like a TV. If you have three small lights (red, green, blue), you can create a small black dot by turning off all three colors of lights at that location. Boom, it's black!
So, is it possible that you turn off the projector to make it black? This can't be right, right? If this were the case, you wouldn't be able to tell the difference between the projected black color and the screen even without turning on the projector. Yes, that's exactly how it works.
Check it out: In the following image, I am presenting a slide that is half black and half white. The slide takes up most of the screen.