Question

The lowest usable frequency depends on the absorption of which of the following layers?

(a) D-layer

(b) E-layer

(c) F-layer

(d) G-layer

This question was posed to me at a job interview.

I'm obligated to ask this question of Radio Shop topic in section Radio Shop of Aircraft Maintenance

Answer 1

The correct answer is (a) D-layer

To explain: The lowest usable frequency depends on the absorption of the D-layer. The D-layer is the lower layer of the ionosphere and lies beneath the E-layer.