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NEET 2020 (Phase 2) · Superposition, Coherence & Intensity

Superposition, Coherence & Intensity question from NEET 2020 (Phase 2)

Q84NEET 2020 · PHASE 2Easy

Superposition, Coherence & Intensity

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

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Answer: (b)

At the central maximum the path difference is $\Delta x = 0$ .
Phase difference $\phi = \dfrac{2\pi}{\lambda}\Delta x = 0$ , giving maximum intensity.
So the answer is (b) zero.

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