A$)$ If he closes his visor to be a thin slit $0\mathrm{.}0348$ mm wide and looks at the light hitting a screen $2\mathrm{.}71$ m away, what is the distance from the center to the first dark spot?

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y$\_\{\backslash$text $\{$dark $\}\}=$

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B$)$ If instead he had two slits of width $0\mathrm{.}0348$ mm that are separated by $0\mathrm{.}142$ mm what would be the distance from the center to the first dark spot?

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y$\_\{$d a r k$\}=$

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