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: NCERT Class 12 Physics Part II, Chapter 10, Wave Optics._
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