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

  • question_answer
    On investigation of light from three different stars A, B and C, it was found that in the spectrum of A the intensity of red colour is maximum, in B the intensity of blue colour is maximum and in C the intensity of yellow colour is maximum. From these observations it can be concluded that [CPMT 1989]

    A)            The temperature of A is maximum, B is minimum and C is intermediate

    B)            The temperature of A is maximum, C is minimum and B is intermediate

    C)            The temperature of B is maximum, A is minimum and C is intermediate

    D)            The temperature of C is maximum, B is minimum and A is intermediate

    Correct Answer: C

    Solution :

                       According to Wein?s law, \[{{\lambda }_{m}}T=\]constant            \[{{\lambda }_{r}}>{{\lambda }_{y}}>{{\lambda }_{b}}\Rightarrow {{T}_{r}}<{{T}_{y}}<{{T}_{b}}\] or \[{{T}_{A}}<{{T}_{C}}<{{T}_{B}}\]


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