Question

Determine the wavelength of blackbody radiation emitted from a body at room temperature. To which part of the EM spectrum does this radiation belong?

Answer 1

Room temperature = 300 K

According to Wein's displacement law:

Where is the wavelength at which blackbody emits maximum energy

b is the Wein's displacement constant (2.898 x 10-3 m.K)

T is the temperature of the blackbody

Substituting values in the above equation we get:

Therefore wavelength of 9.66 x 10-6 m is emitted from the blackbody at room temperature.

This wavelength lies in the infrared region of electromagnetic spectrum. (10-3-10-6 m).

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