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

  • question_answer
    A point object is placed at a distance of 25 cm from a convex lens. A glass slab of thickness 15 cm and the\[R.\text{ }I=3/2\]is inserted between lens and object. The image is formed at infinity. Find focal length (in cm) of the lens?

    Answer:

    20.00


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