NEET Physics Interference MCQ Question
Consider a computer-generated fringe pattern produced by two point sources S1 and S2 on a screen with a separation of d = 0.025 mm, a distance D = 5 cm from the screen, and a wavelength λ = 5 × 10^–5 cm. Which condition for dark fringes is satisfied at a point on the screen?
Path difference equals (n + 1/2)λ
Path difference equals nλ
Phase difference equals nπ
Phase difference equals 2nπ
Correct Answer
Detailed Explanation
Dark fringes occur when the path difference is (n + 1/2)λ, leading to destructive interference, as described in the NCERT context.
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