Basic Qualification · B-007 Radio wave propagation · B-007-001-005
What type of wave is commonly known as sky wave?
- A Scattered wave
- B Space wave
- C Ionospheric wave
- D Tropospheric wave
Correct answer: C — Ionospheric wave. From the official ISED question bank, verified word for word.
Why
Sky waves are called Ionospheric waves because they travel by bouncing off the ionosphere, a layer of charged particles high in the atmosphere that reflects radio signals back to Earth. The full explanation — and one for every question — is in Pro.
Practise this section
How signals travel: the ionosphere and its layers, skip, ground wave, sporadic E, and which bands work when.