Basic Qualification · B-007 Radio wave propagation · B-007-003-011
How does an increase in the height of the refracting region affect skip distance?
- A It decreases, due to the geometry of the signal path
- B It decreases, due to the increase in critical frequency
- C It increases, due to the geometry of the signal path
- D It increases, due to the increase in critical frequency
Correct answer: C — It increases, due to the geometry of the signal path. From the official ISED question bank, verified word for word.
Why
When the layer in the upper atmosphere that bends radio waves back to Earth sits higher, the signal travels farther before returning, much like skipping a stone from a higher bridge makes it land further away. 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.