NEET Physics Interference MCQ Question
Which of the following statements about light interference is correct?
Two coherent sources can produce a stable interference pattern with a fixed phase relationship.
Incoherent sources can produce constructive interference at certain points.
Destructive interference occurs when the path difference equals an integer multiple of the wavelength.
The intensity of light at a point of constructive interference is always zero.
Correct Answer
Detailed Explanation
Statement A is correct because coherent sources maintain a fixed phase relationship, allowing for stable interference patterns. Statement B is incorrect as incoherent sources lack a fixed phase relationship. Statement C misstates the condition for destructive interference, as it occurs at half-integer multiples of the wavelength. Statement D is false since constructive interference increases intensity, not reduces it.
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