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 Light of wavelength 524nm falls on a slit that is 3.33x10-3mm wide. Estimate how far the...

 Light of wavelength 524nm falls on a slit that is 3.33x10-3mm wide. Estimate how far the first rightest diffraction fringe is from the strong central maximum if the screenis 10.0m away.
The solution given for problem 19 chapter 24 is not very cleartowards the end.
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Answer #1
λ = 524 nm, a = 3.33x10^-3 mm, L = 10.0 m
first brightest diffraction fringe: asinθ = 3λ/2,sinθ = 3λ/(2a) = 0.236, θ = 13.65 degrees
y = Ltanθ = 2.43 m
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