Why is it that we have a dozen or so different electromagnetic wave types and yet every one can be used for analog and digital communication?

Question

Hi all: Why is it that we have a dozen or so different electromagnetic wave types and yet every one of them can be used for analog and digital communication?

Thanks!

In: Physics

Answer 1

Non-electromagnetic waves can also be used for communication in pretty much the same way. You can throw rocks in a calm pond and treat the waves in water as a form of communication. The frequency and bandwidth is just slow because it’s easier to throw photons than rocks.