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Light from a distant point source is incident on a narrow slit. Each of the graphs below shows the intensity on a distant screen as a function of λ. The only difference among the six physical situations is the width of the slit.
The horizontal scale is the same for all graphs. The vertical scale has been normalized so that the maximum intensity is the same for all cases.
Rank the cases according to the width of the slit, from largest to smallest. Explain your reasoning.

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