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

1. the radiation emitted lies in the ultraviolet region and hence is not visible.
2. the radiation emitted is in the infra-red region.
3. the radiation is emitted only during the day.
4. the radiation is emitted during the summers and absorbed during the winters.

Correct answer: the radiation emitted is in the infra-red region.

Solution

The human body emits radiation primarily in the infrared region due to its temperature, as described by blackbody radiation principles.

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