Basic Qualification · B-007 Radio wave propagation · B-007-003-004
Skip zone is:
- Aa zone between the antenna and the return of the first refracted wave
- Ba zone between the end of the ground wave and the point where the first ionosphere-refracted wave returns to Earth
- Ca zone of silence caused by lost sky waves
- Da zone between any two refracted waves
Correct answer: B — a zone between the end of the ground wave and the point where the first ionosphere-refracted wave returns to Earth. From the official ISED question bank, verified word for word.
Why
A skip zone is the silent gap on the ground where you cannot hear a signal because the local ground wave has faded out, yet the sky wave has not yet bent back down from the ionosphere to reach you. The full explanation — and one for every question — is in Pro.
Practise this section
Radio wave propagation is section B-007 of the Basic exam: How signals travel: the ionosphere and its layers, skip, ground wave, sporadic E, and which bands work when.
Drill B-007 — free, no account