Basic Qualification · B-007 Radio wave propagation · B-007-007-008
Dans l'ionosphère, où se produit l'activité aurorale?
- ADans la couche
- BDans la couche E
- CDans la couche F
- DDans la bande équatoriale
Correct answer: B — Dans la couche E. Question tirée de la banque officielle d'ISDE.
Why
Auroral activity happens when charged particles from the Sun collide with gases in the ionosphere, creating the glowing lights we see. 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