The ways in which radio frequency and microwave signals propagate through the atmosphere include all of the following except _________.
A) stratospheric
B) ground wave
C) line- of- sight
D) ionospheric

Question

Quizplus · Accepted Answer

Stratospheric propagation is not a recognized method by which radio frequency and microwave signals propagate through the atmosphere. Ground wave, line-of-sight, and ionospheric are all established modes of radio wave propagation.

The Ways in Which Radio Frequency and Microwave Signals Propagate