Basic Qualification · B-007 Radio wave propagation · B-007-008-009
Sur quelle bande la propagation par diffusion météorique est-elle la plus efficace?
- A15 mètres
- B160 mètres
- C6 mètres
- D40 mètres
Correct answer: C — 6 mètres. Question tirée de la banque officielle d'ISDE.
Why
Meteor scatter works best on the 6 metres band because the ionized trails left by burning meteors are most effective at reflecting radio waves in the very high frequency range, which includes 6 metres. 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