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Electromagnetic Waves and Wave Optics: YDSE — Central Maximum MCQ

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YDSE — Central MaximumEasyQuestion 20205

Question

The central maximum in YDSE is located where:
  1. A
    Path difference = λ
  2. B
    Path difference = λ/2
  3. C
    Path difference = 0
    Correct
  4. D
    Path difference = λ/4

Correct answer

Path difference = 0

Explanation

At the central fringe (n = 0), path difference = 0 → both sources reach in phase → maximum constructive interference → brightest fringe at the centre.

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