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?
- AIt decreases, due to the geometry of the signal path
- BIt decreases, due to the increase in critical frequency
- CIt increases, due to the geometry of the signal path
- DIt 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
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