Physics-Interference
NEET Physics Interference MCQ Question
Type: MCQ-conceptual-Hard-Class 12
Which of the following statements about interference of light waves is correct?
A
Incoherent sources can produce interference patterns under certain conditions.
B
Destructive interference occurs when the phase difference is a multiple of 2π.
C
Constructive interference results in a bright fringe when the path difference is an integer multiple of the wavelength.
D
Only light from two identical sodium lamps can create coherent sources.
Correct Answer
Option C
Detailed Explanation
Constructive interference occurs when the path difference between light waves is an integer multiple of the wavelength, leading to a bright fringe, as stated in the NCERT context. Incoherent sources cannot produce interference patterns due to rapid phase changes.
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