Courtesy of Rhett Allain
However what in regards to the colours from a video projector? It basically does the identical factor. Nevertheless, as an alternative of a bunch of tiny RGB lights, it initiatives RGB colours to completely different areas on the display screen.
Projecting the Coloration Black
Now we’re prepared for the enjoyable stuff. How does a video projector shoot out black gentle? Black gentle could be the absence of any gentle, as we noticed earlier than. How do you challenge nothing? First, let’s think about a display screen like a TV. If in case you have three tiny lights (pink, inexperienced, blue), you can also make a tiny black dot by simply turning off the lights for all three colours in that spot. Increase, it’s black!
So, is it attainable that you simply simply flip off the projector to make black? That may’t be proper, can it? If that was the case, you could not inform the distinction between a projected black shade and the display screen with out the projector even on. Sure, that’s precisely the way it works.
Test it out: Within the following picture, I am projecting a slide that’s half black and half white. The slide takes up many of the display screen.
