Two sources of light are said to be coherent when they emit light of
A. same wavelength
B. same amplitude
C. same intensity
D. constant phase difference
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A and D only
Two sources of light are said to be coherent when they emit light of the same frequency (or same wavelength) and have a constant phase relationship.