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JEE Main & Advanced Physics Ray Optics Question Bank Self Evaluation Test - Ray Optics and Optical Instruments

  • question_answer
    A plane mirror is kept parallel to y-axis. A point object is approaching the mirror with velocity \[\vec{u}=(10\hat{i}+10\hat{j})m/s.\] The magnitude of relative velocity of objective w.r.t image is equal to

    A) \[20\sqrt{2}m/s\]  

    B) \[20m/s\]

    C) \[10\sqrt{2}m/s\]

    D) \[10m/s\]

    Correct Answer: B

    Solution :

    [b] Velocity of image in mirror \[\vec{v}=-10\hat{i}+10\hat{j}\text{           }{{\vec{v}}_{rel}}=\vec{u}-\vec{v}=20\hat{i}.\]


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