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P Δ = (l2 - l1)n. , n ≈ 1 Δ l2 l1 A. ,
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l22 = l2 + (x + d/2)2 l12 = l2 + (x - d/2)2
l22 - l12 = 2xd Δ = l2 - l1 = 2xd/(l1 + l2)
l >> d , l1 + l2 ≈ 2l. Δ = xd/l
:
Δ = xd/l = mλ => xmax = m*(l/d)*λ, m
:
Δ = xd/l = (m + 1/2)λ => xmin = (m + 1/2)*(l/d)*λ, m
Δx () :
Δx = (l/d)*λ
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