JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Assertion and Reason

  • question_answer
    Assertion             :       The energy and momentum (p) of a photon are related by \[p=E/c\]. Reason                 :       The photon behaves like a particle. [AIIMS 2005]

    A)             If both assertion and reason are true and the reason is the correct explanation of the assertion.

    B)             If both assertion and reason are true but reason is not the correct explanation of the assertion.

    C)             If assertion is true but reason is false.

    D)             If the assertion and reason both are false.

    E)             If assertion is false but reason is true.

    Correct Answer: A

    Solution :

                       Momentum of a photon is given by \[p=\frac{h}{\lambda }\] Also the photon is a form of energy packets behaves as a particle having energy \[E=\frac{hc}{\lambda }\]. So \[p=\frac{E}{c}\]


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