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Discussion :: Heat and Mass Transfer

  1. The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as

    2. A.

     Emissivity
    B.

     Transmissivity
    C.

     Reflectivity
    D.

     Intensity of radiation

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    Answer : Option D

    Explanation :

    The intensity of radiation is defined as the rate of emission of radiation in a given direction from a surface per unit solid angle and per unit projected area of a radiating surface on a plane perpendicular to the direction of radiation.

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