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JEE Main & Advanced Physics Ray Optics Question Bank Microscope and Telescope

  • question_answer
    Four convergent lenses have focal lengths 100 cm, 10 cm, 4 cm and 0.3 cm. For a telescope with maximum possible magnification, we choose the lenses of focal length [KCET 1994]

    A)            100 cm, 0.3 cm                     

    B)            10 cm, 0.3 cm

    C)            10 cm, 4 cm                           

    D)            100 cm, 4 cm

    Correct Answer: A

    Solution :

               \[m=-\frac{{{f}_{0}}}{{{f}_{e}}}\].


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