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

  • question_answer
    A point object ?O? is at the center of curvature of a concave mirror. The mirror starts to move at a speed u, in a direction perpendicular to the principal axis. Then, the initial velocity of the image is

    A) 2u, in the direction opposite to that of mirror's velocity

    B) 2u, in the direction same as that of mirror's velocity

    C) zero

    D) u, in the direction same as that of mirror's velocity

    Correct Answer: B

    Solution :

    [b] Image velocity (w.r.t mirror) \[=-m\times Object\text{ }velocity\] (w.r.t mirror) Here m=l


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