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

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    The diameter of objective of a telescope is 1m. Its resolving limit for the light of wave length 4538 Å, will be [Pb. PET 2003]

    A)            \[5.54\times {{10}^{-7}}rad\]

    B)            \[2.54\times {{10}^{-4}}rad\]

    C)            \[6.54\times {{10}^{-7}}rad\]

    D)            None of these

    Correct Answer: A

    Solution :

                       Resolving limit            \[d\theta =\frac{1.22\,\lambda }{a}=\frac{1.22\times 4538\times {{10}^{-10}}}{1}\]\[=5.54\times {{10}^{-7}}rad\].


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