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Discussion :: Heat Transfer

  1. Pick out the wrong statement:

    2. A.
    With change in temperature, the radiant energy emitted by a black body remains unchanged.
    B.
    Absorptivity of a body approaches unity in case of diffuse reflection.
    C.
    Absorptivity of a perfectly black body is unity.
    D.
    Value of Stefan-Boltzman constant is 4.876 x 10-8 KCal/m2.hr.°K4.

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    Answer : Option A

    Explanation :

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