Basic Qualification · B-007 Radio wave propagation · B-007-007-001
Which ionospheric region most affects sky-wave propagation on the 6-metre band?
- A The F2 region
- B The F1 region
- C The D region
- D The E region
Correct answer: D — The E region. From the official ISED question bank, verified word for word.
Why
The E region, a layer of the ionosphere located about 100 kilometres up, is the primary reflector for 6-metre band signals during sporadic E events, which are sudden bursts of ionization that allow these waves to bounce back to Earth over long distances. 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.