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Discussion :: Heat and Mass Transfer

  1. The value of the wavelength for maximum emissive power is given by

    2. A.

     Wien’s law
    B.

     Planck's law
    C.

     Stefan's law
    D.

     Fourier's law

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    Answer : Option A

    Explanation :

    When the temperature of a blackbody radiator increases, the overall radiated energy increases and the peak of the radiation curve moves to shorter wavelengths. When the maximum is evaluated from the Planck radiation formula, the product of the peak wavelength and the temperature is found to be a constant.

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