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Monochromatic light from a distant point source is incident on two slits. The width of each slit is a and the distance between the centers of the slits is d. The resulting graph of relative intensity versus θ is shown at right. (The center of the pattern is at
Sketch the relative intensity graph that would result when each of the following changes is made. Your graphs should show the approximate locations of the maxima and minima and be qualitatively correct as to the relative sizes of the maxima. Explain your reasoning.
- The width of both slits is reduced to a/2, while keeping the spacing d fixed.

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