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Sources 1 and 2 emit lights of different...

Sources 1 and 2 emit lights of different wavelengths whereas sources 3 and 4 emit light of different intensities.
The coherence

A

can be obtained by using sources 1 and 2

B

can be obtained by any of these sources

C

cannot be obtained by any of these sources

D

since contrast suffers when sources 3 and 4 are used so coherence cannot be obtained by using sources 3 and 4

Text Solution

Verified by Experts

The correct Answer is:
b
Different wavelengths would correspond to different frequencies. Lights of different intensities can give coherence even if contrast is poor
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CENGAGE PHYSICS ENGLISH-WAVE OPTICS-Single Correct
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