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

  • question_answer
    Two points separated by a distance of 0.1 mm can just be resolved in a microscope when a light of wavelength 6000 Å is used. If the light of wavelength 4800Å is used  this limit of resolution becomes                                   [UPSEAT 2002]

    A)            0.08 mm                                 

    B)            0.10 mm

    C)            0.12 mm                                 

    D)            0.06 mm

    Correct Answer: A

    Solution :

                       Resolving limit            \[x\propto \lambda \Rightarrow \frac{{{x}_{1}}}{{{x}_{2}}}=\frac{{{\lambda }_{1}}}{{{\lambda }_{2}}}\Rightarrow \frac{0.1}{{{x}_{2}}}=\frac{6000}{4800}\]\[\Rightarrow {{x}_{2}}=0.08\ mm\]


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