Optics Question 1019

Question: Two light sources are said to be coherent if they are obtained from

[MP PET 1996]

Options:

A) Two independent point sources emitting light of the same wavelength

B) A single point source

C) A wide source

D) Two ordinary bulbs emitting light of different wavelengths

Show Answer

Answer:

Correct Answer: B

Solution:

When two sources are obtained from a single source, the wavefront is divided into two parts. These two wavefronts acts as if they emanated from two sources having a fixed phase relationship.



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