Basic Qualification · B-007 Radio wave propagation · B-007-007-002
What effect does tropospheric bending have on 2-metre radio waves?
- A It causes them to travel shorter distances
- B It distorts the signal
- C It interferes with short-range communications
- D It lets you contact stations farther away
Correct answer: D — It lets you contact stations farther away. From the official ISED question bank, verified word for word.
Why
Tropospheric bending acts like a gentle lens in the lower atmosphere that curves 2-metre radio waves back toward the ground, allowing them to travel well beyond the normal line-of-sight horizon. 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.