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JCECE Engineering JCECE Engineering Solved Paper-2011

  • question_answer
    A black body has maximum energy at wavelength \[{{\lambda }_{m}}\] at temperature\[2000\,\,K\]. The corresponding wavelength at a temperature of \[3000\,\,K\] will be

    A) \[\frac{3}{2}{{\lambda }_{m}}\]                                

    B) \[\frac{2}{3}{{\lambda }_{m}}\]

    C) \[\frac{4}{9}{{\lambda }_{m}}\]                                

    D)  \[\frac{9}{4}{{\lambda }_{m}}\]

    Correct Answer: B

    Solution :

    From Wien's law \[2000\times {{\lambda }_{m}}=3000\times {{\lambda }_{m}}\] \[{{\lambda }_{m}}=\frac{2}{3}{{\lambda }_{m}}\]


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