Question Pool -- Category G3B

What usually happens to radio waves with frequencies below the maximum usable frequency (MUF) when they are sent into the ionosphere?
A.
They are bent back to the earth
B.
They pass through the ionosphere
C.
They are completely absorbed by the ionosphere
D.
They are bent and trapped in the ionosphere to circle the Earth

See answer.
Try another question.
Choose another category.