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

Answer 1

The correct option is C Both produce waves of the same wavelength having constant phase difference

[A] Two waves are coherent if both have same wave length d phase difference.