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JEE Main & Advanced Physics Ray Optics Question Bank Numerical Value Type Questions - Refraction at Curved Surface

  • question_answer
    A convex lens of focal length 20 cm and a concave lens of focal length f are mounted coaxially 5 cm apart. Parallel beam of light incident on the convex lens emerges from the concave lens as a parallel beam. Then f (in cm) is ?

    Answer:

    15.00


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