Two coherent sources of light interfere and produce fringe patterns on a screen. For central maximum, the…

Two coherent sources of light interfere and produce fringe patterns on a screen. For central maximum, the phase difference between the two waves will be
  1. zero
  2. π
  3. 3π2
  4. π2

Solution

For central maximum, path difference is zero hence phase difference for coherent sources of light will be zero. And the relation between phase difference and path difference is, ∆ϕ=2πλ∆x, where Δx is path difference and ∆ϕ is phase difference. So due to zero path difference phase difference is also zero.

Asked in: NEET 2020 (Phase 2)

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