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

  • question_answer
    The diameter of the objective lens of a telescope is 5.0 m and wavelength of light is 6000 Å. The limit of resolution of this telescope will be                                                       [MP PMT 1994]

    A)            0.03 sec                                  

    B)            3.03 sec

    C)            0.06 sec                                  

    D)            0.15 sec

    Correct Answer: A

    Solution :

                       Limit of resolution \[=\frac{1.22\ \lambda }{a}\times \frac{180}{\pi }\] (in degree)            \[={{\left( \frac{1.22\times (6000\times {{10}^{-10}})}{5}\times \frac{180}{\pi } \right)}^{o}}=0.03\ sec\]


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