JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves JEE PYQ-Photo Electric Effect X-rays

  • question_answer
    If the kinetic energy of a free electron doubles, its de-Broglie wavelength changes by the factor [AIEEE 2005]

    A) \[\frac{1}{2}\]

    B) 2

    C) \[\frac{1}{\sqrt{2}}\]

    D) \[\sqrt{2}\]

    Correct Answer: C

    Solution :

    [c] We know that, de-Broglie equation is
    and the kinetic energy,
     
    Thus,
                  
     
     


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