AM radio stations have greater range than FM stations because
A)AM is more efficient than FM.
B)they have more powerful transmitters.
C)their lower frequency radio waves reflect off the ionosphere.
D)none of the above

Question

Quizplus · Accepted Answer

AM radio waves have longer wavelengths than FM radio waves, which allows them to reflect off the ionosphere and travel longer distances. This is known as ionospheric skip or skywave propagation. FM waves are also affected by obstacles such as buildings and hills, which limits their range.  Additionally, although AM and FM stations may have similar power outputs, since AM waves are transmitted in all directions and FM waves are transmitted in only one direction, AM signals can appear much more powerful when received.

AM Radio Stations Have Greater Range Than FM Stations Because