Basic Qualification · B-007 Radio wave propagation · B-007-005-001
How do sunspots change the ionization of the atmosphere?
- A The more sunspots there are, the lesser the ionization
- B Unless there are sunspots, the ionization is zero
- C They have no effect
- D The more sunspots there are, the greater the ionization
Correct answer: D — The more sunspots there are, the greater the ionization. From the official ISED question bank, verified word for word.
Why
Sunspots are dark patches on the Sun that actually signal intense magnetic activity and increased ultraviolet radiation. 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.