How do projectors and screens show the color black if black is the absence of light?

Question

How do projectors and screens show the color black if black is the absence of light?

In: Technology

Answer 1

This is why movie theaters are dark. The blackest the screen can be is how it looks in the ambient light. The image being protected into it is so much brighter it gives the illusion of black, but this is harder if the room is not dark.