Basic Qualification · B-007 Radio wave propagation · B-007-008-002
If you receive a weak, distorted signal close to the maximum usable frequency, what type of propagation is probably occurring?
- A Ground wave
- B Line-of-sight
- C Ducting
- D Scatter
Correct answer: D — Scatter. From the official ISED question bank, verified word for word.
Why
Scatter happens when radio waves bounce off irregularities in the upper atmosphere, sending a small, weak, and often distorted signal back to Earth even when the frequency is near the maximum usable limit. 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.