J & K CET Engineering J and K - CET Engineering 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.


You need to login to perform this action.
You will be redirected in 3 sec spinner