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

  • question_answer
    The focal length of objective and eye-piece of a telescope are 100 cm and 5 cm respectively. Final image is formed at least distance of distinct vision. The magnification of telescope is                                         [RPET 1997]

    A)            20  

    B)            24

    C)            30  

    D)            36

    Correct Answer: B

    Solution :

               \[|m|\ =\frac{{{f}_{o}}}{{{f}_{e}}}\left( 1+\frac{{{f}_{e}}}{D} \right)=\frac{100}{5}\left( 1+\frac{5}{25} \right)=24\]


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