Basic Qualification · B-007 Radio wave propagation · B-007-002-008
Why is the F2 region mainly responsible for the longest distance radio-wave propagation?
- A Because it is the highest ionospheric region
- B Because it exists only at night
- C Because it is the lowest ionospheric region
- D Because it does not absorb radio waves as much as other ionospheric regions
Correct answer: A — Because it is the highest ionospheric region. 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 much farther before returning to Earth compared to lower layers. 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.