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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 26

  • question_answer
    Shown below are the black body radiation curves at temperatures\[{{\operatorname{T}}_{1}}\,\,and\,\,{{T}_{2}}\] \[({{T}_{2}}>{{T}_{1}})\]. Which one of the following plots is correct?

    A)

    B)       

    C)       

    D)       

    Correct Answer: A

    Solution :

    According to Wen?s displacement law \[{{\lambda }_{m}}\propto \frac{1}{T}\Rightarrow \lambda {{m}_{2}}<\lambda {{m}_{1}}\left[ \because {{T}_{1}}<{{T}_{2}} \right]\] Therefore \[I-\lambda \] graph for \[{{T}_{2}}\] has lesser wavelength (\[{{\lambda }_{m}}\]) and so curve for \[{{T}_{2}}\] will shift towards left side.


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