Question: Sodium light ( = 589 nm) illuminates two slits separated by d = 2.0 mm. The slit-screen distance D is 40 mm. What percentage error

Sodium light (λ = 589 nm) illuminates two slits separated by d = 2.0 mm. The slit-screen distance D is 40 mm. What percentage error is made by using Eq. 35-14 to locate the m : 10 bright fringe on the screen rather than using the exact path length difference?

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