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Question

Hottest region of the atmosphere is:

A
mesosphere
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B
stratosphere
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C
thermosphere
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D
troposphere
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Solution

The correct option is C thermosphere
The thermosphere absorbs much of the radiation that Earth receives from the sun, leaving only a fraction to actually reach the surface. Ultraviolet radiation, visible light, and high-energy gamma radiation are all absorbed by the thermosphere, which causes the few particles present to heat up considerably.

Hence, it is the hottest region of the atmosphere.

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