Two sources of waves are called coherent ifA. (a) Both have the same amplitude of vibrationsB. (b) Both produce waves of the same wavelengthC. (c) Both produce waves of the same wavelength having constant phase differenceD. (d) Both produce waves having the same velocity

Two sources of waves are called coherent ifA. (a) Both have the same a

1.	Two sources of waves are called coherent ifA. (a) Both have the same amplitude of vibrationsB. (b) Both produce waves of the same wavelengthC. (c) Both produce waves of the same wavelength having constant phase differenceD. (d) Both produce waves having the same velocity
Answer» Correct Answer - C Two coherent sources must have a constant phase difference otherwise they can not produce interference.

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Two sources of waves are called coherent ifA. (a) Both have the same amplitude of vibrationsB. (b) Both produce waves of the same wavelengthC. (c) Both produce waves of the same wavelength having constant phase differenceD. (d) Both produce waves having the same velocity

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