Two separate light sources lighting one wall are:

ACoherent

BPolarised

CRefracted

DIncoherent

Answer & Solution

Correct answer: D. Incoherent

1. Their phase difference changes very rapidly with time. 2. No steady pattern of maxima and minima can form. 3. Such sources are incoherent. _Source: syllabus Physics Part II, Chapter 10, Wave Optics._

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