Green light ((lambda=510 mathrm{~nm})) shines through two slits separated by (2.30 times 10^{-6} mathrm{~m}). The resulting diffraction

Question:

Green light $(\lambda=510 \mathrm{~nm})$ shines through two slits separated by $2.30 \times 10^{-6} \mathrm{~m}$. The resulting diffraction pattern is cast on a screen $450 \mathrm{~mm}$ away. How far from the central bright fringe is the time-averaged intensity reduced to $12 \%$ of its maximum?

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