Basic Qualification · B-007 Radio wave propagation · B-007-003-006
Assuming constant ionosphere region height, how does a higher radiation angle affect skip distance?
- A It decreases, due to the geometry of the signal path
- B It decreases, due to the decrease in critical frequency
- C It increases, due to the geometry of the signal path
- D It increases, due to the increase in critical frequency
Correct answer: A — It decreases, due to the geometry of the signal path. From the official ISED question bank, verified word for word.
Why
When you aim a radio wave at a steeper angle toward the ionosphere, the signal travels a shorter horizontal distance before bouncing back to Earth, which is purely a matter of geometry. The full explanation — and one for every question — is in Pro.
Practise this section
How signals travel: the ionosphere and its layers, skip, ground wave, sporadic E, and which bands work when.