Two coherent sources of light interfere and produce fringe pattern on a screen. For the central maximum, the phase difference between two waves will be:
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Question

Two coherent sources of light interfere and produce fringe pattern on a screen. For the central maximum, the phase difference between two waves will be:

G1 Physics · Accepted Answer

Step 1: Phase difference Δφ = 2πΔx/λ. Step 2: At central maximum, optical path difference Δx = 0. Step 3: Therefore Δφ = 0 modulo 2π. Final answer: (A) zero.