J & K CET Medical J & K - CET Medical Solved Paper-2006

  • question_answer
    A perfect black body is one whose emissive power is :

    A)  maximum                          

    B)  zero

    C)  unity                                    

    D)  minimum

    Correct Answer: C

    Solution :

                     A black body is an object that absorbs all electromagnetic radiation that falls on to it. No radiation passes through it and none is reflected. Hence; its emissive power is unity.


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