Basic Qualification · B-007 Radio wave propagation · B-007-007-004
Quel terme décrit la partie d'une onde rayonnée maintenue près de la surface de la Terre à cause de la réfraction de l'atmosphère?
- AL'onde ionosphérique
- BL'onde troposphérique
- CL'onde diffusée
- DL'onde de sol
Correct answer: B — L'onde troposphérique. Question tirée de la banque officielle d'ISDE.
Why
A tropospheric wave is the part of a radio signal that bends or curves within the lowest layer of our atmosphere, the troposphere, allowing it to follow the Earth's surface over the horizon. 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