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Discussion :: Heat and Mass Transfer

  1. According to Kirchoff's law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a

    2. A.

     Grey body
    B.

     Brilliant white polished body
    C.

     Red hot body
    D.

     Black body

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    Workspace

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    Answer : Option D

    Explanation :

    Kirchhoff's law states that the emissivity and the absorptivity of a surface at a given temperature and wavelength are equal. The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as Kirchhoff's law

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