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

  • question_answer
    The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 Å is of the order [CBSE PMT 2005]

    A)            \[{{10}^{6}}rad\]                

    B)            \[{{10}^{-2}}rad\]

    C)            \[{{10}^{-4}}rad\]               

    D)            \[{{10}^{-6}}rad\]

    Correct Answer: D

    Solution :

                       Angular resolution \[d\theta =\frac{1.22\,\lambda }{a}\]                    \[=\frac{1.22\times 5000\times 10\times {{10}^{-10}}}{10\times {{10}^{-2}}}\]\[=6.1\times {{10}^{-6}}rad\].


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