The following is/are laws of black body radiation.

  1. Plank’s law
  2. Stefan-Boltzmann law
  3. both of the above
  4. None of the above

Answer (Detailed Solution Below)

Option 3 : both of the above
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CONCEPT

Black body Radiation: A body that absorbs all the radiations falling on it is called a blackbody. This body will emit radiation at its fastest rate is called blackbody radiation. A blackbody is also called an ideal radiator.

EXPLANATION

The laws of blackbody radiation governed by

Planck's law of black-body radiation: Planck's law describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium at a given temperature T, when there is no net flow of matter and energy between the body and its environment.

Wien's displacement law: Wien's displacement law states that the blackbody radiation curve for different temperature peaks at a wavelength that is inversely proportional to the temperature.

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Stefan–Boltzmann law: The Stefan–Boltzmann law describes the power radiated per unit time from a black body in terms of its temperature.

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