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NEET Sample Paper NEET Sample Test Paper-10

  • question_answer
    An astronical telescope has magnifying power 10. The focal length of the eyepiece is 20cm. The focal length of the objective is:

    A)  \[1/200\,cm\]              

    B)  \[1/2\,cm\]

    C)  \[2\,cm\]                     

    D)  \[200\,cm\]

    Correct Answer: D

    Solution :

    As, \[m=\frac{{{f}_{O}}}{{{f}_{e}}}=10\] \[\Rightarrow \] \[{{f}_{O}}=200cm\] (as  \[{{f}_{e}}=20cm\]


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