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

  • question_answer
    A Galileo telescope has an objective of focal length \[100cm\] and magnifying power 50. The distance between the two lenses in normal adjustment will be [BHU 2002; Pb. PET 2002]

    A)            96 cm                                      

    B)            98 cm

    C)            102 cm                                    

    D)            104 cm

    Correct Answer: B

    Solution :

                       By using \[m=\frac{{{f}_{o}}}{{{f}_{e}}}\Rightarrow {{f}_{e}}=\frac{100}{50}=2\ cm\]            Also \[L={{f}_{o}}-{{f}_{e}}=100-2=98\ cm\]


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