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24 April, 01:22

What happens to the width of the central diffraction pattern (in the single slit experiment) as the slit width is changed and why?

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  1. 24 April, 02:06
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    width of fringes are increased

    Explanation:

    The width of central maxima is given by the following expression

    Width = 2 x Dλ / d

    D is distance of screen from source, d is slit width and λ is wavelength of light source. Here we see, on d getting decreased, width will increase because d is in denominator.

    Due to increased width, position of a fringe moves away from the centre.
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