Multiple choice

Which layer, of the earth’s atmosphere, reflects back the radio waves to the earth’s surface?

  1. Ionosphere

  2. Stratosphere

  3. Mesosphere

  4. Exosphere

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

The ionosphere contains a high concentration of ions and free electrons, which allows it to reflect radio waves back to Earth, enabling long-distance communication.