Two light sources are said to be coherent if they are obtained from

When two sources are said to be coherent?

Two waves are said to be coherent, if they have

Two sources are to be coherent if the waves originated from them are of equal-

Two sources of light are said to be coherent if they emit light of

Two sources of light are said to be coherent if the waves produced by them have the same

(i) Write the condition under which light source can be said to be coherent. (ii) Why it is said to have coherent sources to produce an interference pattern ?