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Haryana PMT Haryana PMT Solved Paper-2002

  • question_answer
    In an atom bomb, a temperature of about 10     million degrees is developed at the moment      of explosion. In what region of the spectrum do the wavelength corresponding to      maximum energy density lie if the light source   is in the atom bomb?            

    A)  ultravoilet region           

    B)  visible region

    C)  infrared region                

    D)  X-ray region

    Correct Answer: D

    Solution :

                    From Weins law \[{{\lambda }_{m}}T=\text{constant = 0}\text{.3}\times \text{1}{{\text{0}}^{-2}}\] \[{{\lambda }_{m}}=\frac{0.3\times {{10}^{-2}}}{T}=\frac{0.3\times {{10}^{-2}}}{10\times {{10}^{6}}}=3\overset{\text{o}}{\mathop{\text{A}}}\,\] Therefore, It lies in X-ray region


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