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JEE Main & Advanced Sample Paper JEE Main Sample Paper-35

  • question_answer
    A beam of electron is used in YDSE experiment. the slit width is d, when the velocity of electron is increased, then:

    A)  no interference is observed

    B)  fringe width increases.

    C)  fringe width decrease.

    D)  fringe width remains same.

    Correct Answer: C

    Solution :

    Wavelength \[\left( \lambda =\frac{h}{p} \right)\] will decrease on increase of momentum or velocity of electron.                         \[\omega \propto \lambda \] so, fringe width will decrease.


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