How is physics involved inthe communication system of a spacecraft?>?

Question

How is physics involved inthe communication system of a spacecraft?>?

Answer 1

Communication systems involve radio frequencies that travel through space and wires.

A few things to use are"

Inverse square law of intensity.

Efficiency of frequency trasmission through a medium.

wave superposition.

All electrical theories.

btw spacecrafts must military space crafts must pass Mil-Std-461.  So that stray signals are minimized and do not interfere  (noise, or unwanted signals) with communication (wanted signals)