Question

Is it necessary to have two waves of equal intensity to study interference pattern? Will there be an effect on clarity if the waves have unequal intensity?

Answer 1

No, it is not necessary to have two waves of equal intensity to study interference pattern. If the waves have unequal intensities, we get a minimum intensity at the points where destructive interference occur. But, if the waves have equal intensities, we get zero intensity at the points where destructive interference occur.