NEET Physics Interference MCQ Question
Which of the following statements about interference are correct?
Constructive interference occurs when the path difference is a whole number multiple of the wavelength.
Destructive interference results in maximum intensity at the point of overlap.
Incoherent sources produce interference patterns due to their fixed phase relationship.
The resultant intensity in constructive interference is four times the intensity of each individual source.
Correct Answer
Detailed Explanation
Constructive interference happens when the path difference is equal to nλ, leading to a resultant intensity of 4I₀. Destructive interference leads to zero intensity, and incoherent sources do not maintain a fixed phase relationship, so they cannot produce interference patterns.
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