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JEE Main & Advanced Physics Transmission of Heat Question Bank Radiation Wein's law

  • question_answer
    If wavelengths of maximum intensity of radiations emitted by the sun and the moon are \[0.5\times {{10}^{-6}}m\] and \[{{10}^{-4}}m\] respectively, the ratio of their temperatures is [MP PMT 1990]

    A)            1/100                                       

    B)            1/200

    C)            100

    D)            200

    Correct Answer: D

    Solution :

               \[{{\lambda }_{m}}T\]=constant Þ\[\frac{{{T}_{1}}}{{{T}_{2}}}=\frac{{{\lambda }_{2}}}{{{\lambda }_{1}}}\]Þ\[\frac{{{10}^{-4}}}{0.5\times {{10}^{-5}}}\]=200.


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