Multiple choice

A layer in Earth’s atmosphere called ionosphere facilitates radio communication. Why?

  1. The presence of ozone causes the reflection of radio waves to Earth.
  2. Radio waves have a very long wavelength.

Which of the statements given above is/are correct?

  1. 1 only

  2. 2 only

  3. Both 1 and 2

  4. Neither 1 nor 2

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ionosphere has high concentration of free electrons and gases. These free electrons completely surround Earth.