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Q: Radio waves transmitted from the earth are reflected back to the earth by which layer of the atmosphere ?
  • A. Mesosphere
  • B. Stratosphere
  • C. Troposphere
  • D. Ionosphere
Correct Answer: Option D - The portion of the thermosphere where charged particles are abundant is called lonosphere. extending from about 80 to 300 km in altitude the ionosphere is an electrically conducting region capable of reflecting radio signals back to Earth.
D. The portion of the thermosphere where charged particles are abundant is called lonosphere. extending from about 80 to 300 km in altitude the ionosphere is an electrically conducting region capable of reflecting radio signals back to Earth.

Explanations:

The portion of the thermosphere where charged particles are abundant is called lonosphere. extending from about 80 to 300 km in altitude the ionosphere is an electrically conducting region capable of reflecting radio signals back to Earth.