Basic Qualification · B-007 Radio wave propagation · B-007-005-006
Quel effet de l'activité du Soleil influence la propagation ionosphérique au quotidien?
- ALes éjections de masse coronale ("CME")
- BLes émissions électromagnétiques et les émissions de particules
- CLe vent solaire
- DLe rayonnement infrarouge
Correct answer: B — Les émissions électromagnétiques et les émissions de particules. Question tirée de la banque officielle d'ISDE.
Why
The sun constantly sends out electromagnetic waves and streams of charged particles that reach Earth every day, directly changing the ionosphere's ability to bounce radio signals. 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