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

  • question_answer
    A particular star (assuming it as a black body) has a surface temperature of about \[5\times {{10}^{4}}K.\]The wavelength in nanometers at which its radiation becomes maximum is (b = 0.0029 mK)                                               [EAMCET (Med.) 2003]

    A)            48  

    B)            58

    C)            60  

    D)            70

    Correct Answer: B

    Solution :

                       According to Wein?s displacement law            \[{{\lambda }_{m}}T=b\]or \[{{\lambda }_{m}}=\frac{b}{T}\]\[=\frac{0.0029}{5\times {{10}^{4}}}=58\times {{10}^{-9}}m=58nm\]


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