Basic Qualification · B-007 Radio wave propagation · B-007-003-002
What is the maximum distance along the Earth's surface that is normally covered in one hop using the F2 region?
- A300 km
- B4 000 km
- C12 000 km
- D2 000 km
Correct answer: B — 4 000 km. From the official ISED question bank, verified word for word.
Why
The F2 region sits highest in the ionosphere, allowing radio waves to bounce off it and travel very far before returning to Earth, typically covering about 4 000 km in a single hop. 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