Interference: Diffraction Grating

The same Young’s formula works for multiple slits as it did for 2 slits.

d

lens

bright

bright

s1

s2

s3

s4

s5

s2 = s1 + ?

s3 = s2 + ? = s1 + 2?

s4 = s3 + ? = s1 + 3?

s5 = s4 + ? = s1 + 4?

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