Do intersecting light beams affect each other at the intersection point? If so, how? Why or why not?

Question

How does an experiment with two light projectors beaming identical images intersecting before the images are focused on different screens sound?Might the images differ from a single identical projection from a third projector with the same image?

What results when the amplitude of the wave is increased or decreased? Is energy level or color, etc, affected?

Answer 1

The phenomena here is known as interference of waves.
When two waves in the same direction of propagation, having the same time period and in the same phase and same amplitude combine it leads to constructive interference and leads to increasing the amplitude of the wave but on the other hand if they are in the opposite phase it leads to destructive interference and amplitude of the wave decreases

Answer 2

Light from different sources can produce interference effects due to the superposition of their respective electromagnetic waves while occupying the same space, but they do not scatter or otherwise interact with each other as charged particle beams do. That means once the beams part company and project onto different screens, there is no effect.

If, however, there were an intervening medium through with the beams pass that has a nonlinear interaction with light, you might see an effect. Air, for example, can only transmit a laser beam up to a certain (rather high) intensity before ionizing. If this intensity can only be achieved by superposing two beams, then the beams will scatter off the ionized patch of air when they cross.

Answer 3

That is a good question. They should interfere with each other in a similar way in which 2 water waves also do. Of course this will not be noticeable without a special experimental set up in the case of light waves.

Answer 4

they will affect each other, that's how different colour lights are produced.