Part I. Optics

Part I. Optics

Light with l = 500 nm is incident on two narrow slits separated by d = 30 mm. An interference pattern is observed on a screen a distance L away from the slits. The first dark fringe is found to be 1.5 cm from the central maximum.

Calculate the distance, L, to the screen. Show all work.

Model solution:

sinq is almost equal to tanq since q is small so


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