Physics-Interference
NEET Physics Interference MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Which of the following statements about interference of light waves is correct?
A
Destructive interference occurs when the path difference is equal to (n + 1/2)λ.
B
Constructive interference results when the phase difference is π.
C
Interference patterns are only observed with incoherent light sources.
D
Destructive interference results in a bright fringe on the screen.
Correct Answer
Option A
Detailed Explanation
Destructive interference occurs at points where the path difference is (n + 1/2)λ, resulting in cancellation of waves, as stated in the NCERT context. Constructive interference occurs at integer multiples of λ, not π phase difference, and requires coherent light sources.
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