Multiple choice

The layer of atmosphere which makes radio communication possible is called

  1. exosphere

  2. troposphere

  3. ionosphere

  4. stratosphere
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The ionosphere is the atmospheric layer extending from about 60km to 1,000km altitude that contains ionized particles. These charged particles reflect radio waves back to Earth, enabling long-distance radio communication beyond the horizon. The exosphere is the outermost layer, while the troposphere (where weather occurs) and stratosphere (where the ozone layer exists) don't have this property.

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