Physics-Interference
NEET Physics Interference MCQ Question
Type: MCQ-fact-Easy-Class 12
What condition must be met for constructive interference to occur at a point P from two coherent sources S1 and S2?
A
The path difference S1P ~ S2P must equal nλ.
B
The path difference S1P ~ S2P must equal (n + 1/2)λ.
C
The waves must be out of phase by π radians.
D
The sources must be incoherent.
Correct Answer
Option A
Detailed Explanation
Constructive interference occurs when the path difference S1P ~ S2P equals nλ, as stated in the NCERT context, leading to a resultant intensity of 4I0.
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