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MHT CET2007PhysicsWave Optics

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

Options

  1. AThe radiation is emitted during the summers and absorbed during the winters
  2. BThe radiation emitted lies in the ultraviolet region and hence is not visible
  3. CThe radiation emitted is in the infrared region
  4. DThe radiation is emitted only during the day

Correct answer

C. The radiation emitted is in the infrared region

Step-by-step solution

The heat radiation emitted by the human body is the infrared radiation. Their wavelength is of the order of 7.9 10⁻⁷ ~m to 10⁻³ ~m which is of cource the range of infrared region. Hence, human body emits radiation in infrared region.

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