# A monochromatic source of 450nm illuminates 2 slits that are 3 x 10^-6 m apart. Find the angle at which the first order maximum occurs. For ?

For a screen that is 1m away from the slit, how far will the first-order maximum be from the center line?

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- NCSLv 71 month agoFavorite Answer
Assuming 1 m qualifies as a "distant" screen,

y ≈ nλD/d

y ≈ 1 * 450e-9m * 1m / 3e-6m ≈ 0.15 m

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