Why can the F region remain important for radio communication even at night?
Answer and explanation
Correct answer: Because ionization at high altitude can persist for a longer time
The F region lies high in the ionosphere and is strongly ionized during daylight. After sunset, ionization decreases, but the thin upper atmosphere allows a useful population of charged particles to persist for some time. This can continue to refract or return suitable radio waves over long distances. Hence option C is correct; rainfall, sea-level position, and tropospheric dust are unrelated distractors.
Frequently asked questions
What is the correct answer to this question?
Because ionization at high altitude can persist for a longer time
Why is this the correct answer?
The F region lies high in the ionosphere and is strongly ionized during daylight. After sunset, ionization decreases, but the thin upper atmosphere allows a useful population of charged particles to persist for some time. This can continue to refract or return suitable radio waves over long distances. Hence option C is correct; rainfall, sea-level position, and tropospheric dust are unrelated distractors.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
