Two sources of waves are called coherent if

Question

Two sources of waves are called coherent if (A) Both have the same amplitude of vibrations (B) Both produce waves of the same wavelength (C) Both produce waves of the same wavelength having constant phase difference (D) Both produce waves having the same velocity

Tardigrade Admin · Accepted Answer

Two coherent sources must have a constant phase difference otherwise they can not produce interference.

Q. Two sources of waves are called coherent if

Both have the same amplitude of vibrations

Both produce waves of the same wavelength

Both produce waves of the same wavelength having constant phase difference

Both produce waves having the same velocity

Two coherent sources must have a constant phase difference otherwise they can not produce interference.