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

  • question_answer
    In an astronomical telescope, the focal lengths of two lenses are 180 cm and 6 cm respectively. In normal adjustment, the magnifying power will be                   [MP PET 1990]

    A)            1080                                         

    B)    200  

    C)            30                                             

    D)    186 

    Correct Answer: C

    Solution :

               \[|m|\ =\frac{{{f}_{o}}}{{{f}_{e}}}=\frac{180}{6}=30\]


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