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
A couple things:
They are all just different frequencies of the same phenomena. The different frequencies have different properties, but if you can build a detector for them, technically they are all usable for communication. Of course, there are obvious downsides to communicating via, say, gamma rays.
As far as digital vs analog? All digital signals originate as analog ones. (All signals are a sum of sine waves of varying frequency, amplitude, and phase.) If you take a “square wave” and zoom in on an oscilloscope, you can see just how analog it is.
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