For constructive interference, path difference Δp =
A(n + 1/2) λ
BRandom
Cλ/2
Dn λ (n = 0, 1, 2, ...)
Answer & Solution
Correct answer: D. n λ (n = 0, 1, 2, ...)
Constructive (bright fringes): path difference is integer multiple of wavelength, Δp = n λ. Destructive: Δp = (n + 1/2) λ.
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