Two light sources are said to be of coherent nature

Question

Two light sources are said to be of coherent nature (A) when they have same frequency and a varying phase difference (B) when they have same frequency and a constant phase difference (C) when they have constant phase difference and different frequencies (D) when they have varying phase difference and different frequencies

Tardigrade Admin · Accepted Answer

Two coherent sources must have the same frequencies and a constant phase difference.

Q. Two light sources are said to be of coherent nature

when they have same frequency and a varying phase difference

when they have same frequency and a constant phase difference

when they have constant phase difference and different frequencies

when they have varying phase difference and different frequencies

Two coherent sources must have the same frequencies and a constant phase difference.