Basic Qualification · B-007 Radio wave propagation · B-007-004-010
What effect do refraction, reflection and Faraday rotation have on a radio wave?
- A Increase the speed of propagation
- B Increase the occupied bandwidth
- C Change the wavelength
- D Change the polarization
Correct answer: D — Change the polarization. From the official ISED question bank, verified word for word.
Why
When a radio wave bounces off surfaces, bends through the atmosphere, or twists due to Earth's magnetic field, its orientation shifts. 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.