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WB JEE Medical WB JEE Medical Solved Paper-2014

  • question_answer
    Consider a black body radiation in a cubical box at absolute temperature T. If the length of each side of the box is doubled and the temperature of the walls of the box and that of the radiation is halved, then the total energy

    A)  halves           

    B)  doubles

    C)  quadruples       

    D)  remains the same

    Correct Answer: D

    Solution :

     Assuming temperature of the body and cubica box is same initially, i.e., T and finally it becomes T/2. Because, temperature of body and surrounding remains same. Hence, no net loss of radiation occur through the body. This total energy remains constant.


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