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JEE Main & Advanced Physics Ray Optics Question Bank Numerical Value Type Questions - Ray Optics and Optical Instruments

  • question_answer
    A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens. If the lens is removed the point where the rays meet will move 5 cm closer to the mounting that holds the lens. Find focal length (in cm) of the lens.

    Answer:

    30


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