Question

two sources of light are said to be coherent if​

Answer 1

Answer:

Such sources are called coherent sources. As these sources are from a single original source, their frequency or wavelength will be the same. Thus, two sources of light are said to be coherent, when they give light waves of same wavelength and constant phase difference.

Answer 2

Explanation:

Such sources are called coherent sources. As these sources are from a single original source, their frequency or wavelength will be the same.

Thus, two sources of light are said to be coherent, when they give light waves of same wavelength and constant phase difference.

Note: If the phase difference between two light waves arriving at a point vary with time in a random way, the wave-sources are said to be incoherent. They cannot produce sustained interference.

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