Multiple Choice Questions on The wave length of the radiation emitted by a body depends upon........ for NDA Exam Preparation

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General Science (NDA)

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    The wave length of the radiation emitted by a body depends upon

    The temperature of the surface.

    Correct Answer

    The area of the surface.

    Incorrect Answer

    The nature of the surface.

    Incorrect Answer

    All of the above factors.

    Incorrect Answer
    Explanation:

    The total radiant heat energy emitted by a surface is proportional to the fourth power of its absolute temperature (the Stefan–Boltzmann law). The rate at which a body radiates (or absorbs) thermal radiation depends upon the nature of the surface as well. DOUBTH


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