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AMU Medical AMU Solved Paper-2002

  • question_answer
    Energy emitted by a black body and wavelength relations at temperature T^K, \[{{T}_{3}}K,\]and \[{{\text{T}}_{\text{3}}}\text{K},\]are shown by curves. The relation between the temperatures is

    A)  \[{{\text{T}}_{\text{3}}}>{{T}_{2}}>{{T}_{1}}\]                  

    B)  \[{{\text{T}}_{1}}>{{T}_{2}}>{{T}_{3}}\]

    C)  \[{{\text{T}}_{1}}={{T}_{2}}={{T}_{3}}\]                

    D)  \[{{\text{T}}_{1}},{{T}_{2}},{{T}_{3}}\]bear no relation

    Correct Answer: A

    Solution :

                     From Wiens displacement law\[{{\lambda }_{m}}T=\] constant. This equation shows that as temperature of black body rises, the maximum energy of emitted radiation shifts towards shorter wavelength, hence higher energy \[\left( E=\frac{hc}{\lambda } \right)\]. Where \[\lambda \] is wavelength.


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