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

  • question_answer
    If both the object and image are at infinite distances form a refracting telescope its magnifying power will be equal to  [AMU (Engg.) 1999]

    A)            The sum of the focal lengths of the objective and the eyepiece

    B)            The difference of the focal lengths of the two lenses

    C)            The ratio of the focal length of the objective and eyepiece

    D)            The ratio of the focal length of the eyepiece and objective

    Correct Answer: C

    Solution :

               In case of a telescope if object and final image are at infinity then \[m=\frac{{{f}_{o}}}{{{f}_{e}}}\]


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