A. Their amplitudes are equal
B. Their frequencies are equal
C. Their wavelengths are equal
D. Their phase difference is constant
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A. Their amplitudes are equal
B. Their frequencies are equal
C. Their wavelengths are equal
D. Their phase difference is constant
Answer: D. Their phase difference is constant Two light sources are coherent when their phase difference is constant.
Answer: D. Their phase difference is constant
See lessTwo light sources are coherent when their phase difference is constant.