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NEET NEET SOLVED PAPER 2017

  • question_answer
    The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m, is                                                                                                                                                          

    A) \[\frac{2h}{\sqrt{mkT}}\]                            

    B) \[\frac{h}{\sqrt{mkT}}\]

    C)   \[\frac{h}{\sqrt{3mkT}}\]                          

    D)  \[\frac{2h}{\sqrt{3mkT}}\]

    Correct Answer: C

    Solution :

                     de-Broglie wavelength \[\lambda =\frac{h}{mv}\] \[=\frac{h}{\sqrt{2m(KE)}}\] \[=\frac{h}{\sqrt{2m(\frac{3}{2}kT)}}\] \[\lambda =\frac{h}{\sqrt{3mkT}}\]


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