NEET 2003 Physics question

We consider the radiation emitted by the human body. Which of the following statements is true :

(1)The radiation emitted is in the infrared regionCorrect
(2)The radiation is emitted only during the day
(3)The radiation is emitted during the summers and absorbed during the winters
(4)The radiation emitted lies in the ultraviolet region and hence is not visible

Answer: (1)

Solution

The human body is at about 310 K. By Wien's law, , so , which lies in the

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Question ID VK-089154