2023 Q12: With reference to the Earth’s atmosphere, which statement is correct?

A. (a) Insolation at the equator is 10 times that at the poles

B. (b) Infrared rays constitute two-thirds of insolation

C. (c) Infrared waves are largely absorbed by water vapour in the lower atmosphere

D. (d) Infrared waves are part of the visible spectrum

Explanation: Most infrared radiation is absorbed by water vapour in the lower atmosphere.

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