Problem

Two waves from coherent sources meet at a point in a path difference of

\Delta x

. Both the waves have same intensities. Match the following two columns.

Column I	Column II
(a) If $\Delta x = \lambda/3$	(p) Resultant intensity will become three times
(b) If $\Delta x = \lambda/6$	(q) Resultant intensity will remain same
(c) If $\Delta x = \lambda/4$	(r) Resultant intensity will become two times
(d) If $\Delta x = \lambda/2$	(s) Resultant intensity will become zero.