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DUMET Medical DUMET Medical Solved Paper-2009

  • question_answer
    In Youngs double slit experiment, two slits are made 5 mm apart and the screen is placed 2 m away. What is the fringe separation when light of wavelength 500 nm is used?

    A)  0.002 mm       

    B)  0.02 mm

    C)  0.2mm         

    D)  2mm

    Correct Answer: C

    Solution :

     Given, \[d=5\times {{10}^{-3}}m,\,\,D=2\,m\], \[\lambda =500\times {{10}^{-9}}m\] Now, fringe width \[\beta =\frac{\lambda D}{d}=\frac{500\times {{10}^{-9}}\times 2}{5\times {{10}^{-3}}}\] = 0.2 mm


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