2- , , . , . . , . d = a + b . ∆ = d sin φ.
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1. φm , .. bsinφm=+-mλ, .
2. φ, ∆=dsinφ , , : dsinφ m ' = m ' λ ;
N A N φ , φm, .. = NAφ. I N2 , : I ~ 2 =>
Imax =N2Iφ .
dsinφ≠m'λ, , .
|sinφ| ≤ 1. , .
8. . , . .
, , (φ = 0), , . . (' =1), ('=2) .. , . .
, . . , .. 2 . , .
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D ∆φ ∆ℓ ' λ λ+∆λ, ∆λ. :
D =∆φ/∆λ ;
D=∆ℓ/∆λ .
, d . : D=dℓ/dφ*dφ/dλ= f/cos^2 φm' D.
R ∆λ, , λ1 λ2, .
λ/∆λ, λ = (λ1+λ2)/2. N: Rpe=λ/∆λ= m'N.