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    Lets say I have a double slit experiment set up and monochromatic light passing through the slits.

    Lets imagine I increase the WIDTH of each slit but maintain the SAME slit separation.

    It is said that there would be fewer fringes observed in such a scenario.

    Why ?
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    What happens to water waves if you diffract them through a gap much larger than their wavelength?
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    (Original post by Pangol)
    What happens to water waves if you diffract them through a gap much larger than their wavelength?
    The diffraction effect is much less pronounced.

    So are you implying the incident light at the slit doesnt diffract as much and only a smaller area of the screen has any noticeable fringes on it ?
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    That's effectively it, yes.
 
 
 
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