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JEE Main & Advanced AIEEE Paper (Held On 11 May 2011)

  • question_answer
    In a Young's double slit experiment, the two slits act as coherent sources of waves of equal amplitude A and wavelength \[\lambda .\] In another experiment with the same arrangement the two slits are made to act as incoherent sources of waves of same amplitude and wavelength. If the intensity at the middle point of the screen in the  first case is \[{{I}_{1}}\] and in the second case is \[{{I}_{2}},\] then the ratio \[\frac{{{I}_{1}}}{{{I}_{2}}}\]is:     AIEEE  Solved  Paper (Held On 11 May  2011)

    A)  2                                            

    B)  1

    C)  0.5

    D)  4

    Correct Answer: A

    Solution :

                                    For coherent sources : \[{{I}_{1}}=4{{I}_{0}}\] For coherent sources \[{{I}_{2}}=2{{I}_{0}}\] \[\frac{{{I}_{0}}}{{{I}_{2}}}=\frac{2}{1}.\]


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