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NEET Sample Paper NEET Sample Test Paper-26

  • question_answer
    In Young's double slit experiment, the two slits acts as cohrent sources of equal amplitude A and wavelength X. In other experiment with some set-up the two slits are the source of equal amplitude A and wavelength \[\lambda ,\] but are in cohrent. The ratio of intensity of light at the midpoint of the screen in the first case to that is second case is:

    A)  1                    

    B)  2

    C)  3                    

    D)  4

    Correct Answer: B

    Solution :

    For Cohrent source \[{{I}_{\max }}=4l\]. \[\therefore \] for incohrent source \[I={{I}_{1}}+{{I}_{2}}=2l.\] \[\therefore \]  Ratio \[=\frac{{{I}_{\max }}}{I{{'}_{\max }}}=2\]


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