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Q: Which of the following statements about the ionosphere is NOT correct ?
  • A. It is located immediately above the stratopause
  • B. It is ionised by solar and cosmic radiation
  • C. It contains charged particles
  • D. Radio waves transmitted from the earth are reflected back to the earth by this layer
Correct Answer: Option A - The Ionosphere stretches roughly from 80 to 400 km above earth's surface. Because the ionosphere is made up of charge particles, it's uniquely reactive to the changing magnetic and electric conditions in space. It is ionized by solar and cosmic radiation. Radio waves transmitted from the earth are reflected back to the earth by this layer.
A. The Ionosphere stretches roughly from 80 to 400 km above earth's surface. Because the ionosphere is made up of charge particles, it's uniquely reactive to the changing magnetic and electric conditions in space. It is ionized by solar and cosmic radiation. Radio waves transmitted from the earth are reflected back to the earth by this layer.

Explanations:

The Ionosphere stretches roughly from 80 to 400 km above earth's surface. Because the ionosphere is made up of charge particles, it's uniquely reactive to the changing magnetic and electric conditions in space. It is ionized by solar and cosmic radiation. Radio waves transmitted from the earth are reflected back to the earth by this layer.