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

Analog and digital are just interpretations of a signal. There isn’t anything special about the underlying wave.

It’s sort of like how sound can be used for different alphabets