Q.

The atmospheric layer farthest from the Earth's surface is known as–

A. Stratosphere
B. Exosphere
C. Ionosphere
D. (4)Mesosphere
Answer» B. Exosphere
Explanation: The Radio waves are reflected back to Earth in the Ionosphere which is anelectrically charged layer of the upper atmosphere. This process is used to communicate beyond the horizon, at intercontinental distances, mostly in the shortwave frequency bands.
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