Optics: visible light from invisible components?

Question

Physics

Optics question. "plain" language.
Is the following situation possible: when waves of invisible light intersect (combine at a point), visible light is formed at the intersection point?
In other words: there are two beams of waves invisible to the eye. But when these beams intersect, the point (set of points) of intersection is visible to the eye.

Answer 1

In optics I don’t know, but in sound it’s definitely possible. studopedia.org/8-92117.html
Yes, and in the radio, when the local oscillator frequency for the PRS does not match the carrier (when tuned to the broadcaster), the beats are very audible.
So if you send two lasers into one such that the difference in their frequencies corresponds to the frequency of visible light, maybe that will work.