A) The radiation is emitted only during the day
B) The radiation is emitted during the summers and absorbed during the winters
C) The radiation emitted lies in the ultraviolet region and hence is not visible
D) The radiation emitted is in the infra-red region
Correct Answer: D
Solution :
Everybody at all time, at all temperatures emits radiation (except at \[T=0\]). The radiation emitted by the human body is in the infra-red region.
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