Two light sources are coherent when

Question

Two light sources are coherent when (A) their amplitudes are equal (B) their frequencies are equal (C) their wavelengths are equal (D) their frequencies are equal and their phase difference is constant with time

Tardigrade Admin · Accepted Answer

Coherency is defined between two waves if their phase difference is not changing. This can result in sustainable interference pattern.

Q. Two light sources are coherent when

their amplitudes are equal

their frequencies are equal

their wavelengths are equal

their frequencies are equal and their phase difference is constant with time

Coherency is defined between two waves if their phase difference is not changing. This can result in sustainable interference pattern.