Basic Qualification · B-007 Radio wave propagation · B-007-002-011
Quelle est la position de la couche E dans l'ionosphère?
- AAu-dessus de la couche
- BAu-dessus de la couche F
- CTout juste sous la couche F
- DTout juste sous la couche
Correct answer: C — Tout juste sous la couche F. Question tirée de la banque officielle d'ISDE.
Why
The E region sits in the middle of the ionosphere, directly underneath the higher F region where long-distance radio waves often bounce. 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