First slide

Radiation

Question

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

Easy

A

The radiation emitted is in the infrared region.
B

The radiation is emitted only during the day.
C

The radiation is emitted during the summers and absorbed during the winters.
D

The radiation emitted lies in the ultraviolet region and hence is not visible.

Solution

A human body emits radiations of longer wavelength than absorbed radiations, the heat radiation belongs to infra red region.

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