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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2011

  • question_answer
        A black body radiates at two temperatures\[{{T}_{1}}\]and\[{{T}_{2}}\]. Such that\[{{T}_{1}}<{{T}_{2}}\]. The frequency corresponding to maximum intensity is

    A)  less at \[{{T}_{1}}\]

    B)  more at \[{{T}_{1}}\]

    C)  equal in the two cases

    D)  cannot say

    Correct Answer: A

    Solution :

                    According to Wiens law, as T increases\[{{\lambda }_{m}}\] decreases and\[{{v}_{m}}\]increases. As                           \[{{T}_{1}}<{{T}_{2}}\] Therefore,          \[{{v}_{{{m}_{1}}}}<{{v}_{{{m}_{2}}}}\]


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