Question

S1 and S2 are the two coherent point sources of light
located in the xy-plane at points (0, 0) and (0, 3lambda)
respectively. Here lambda is the wavelength of light. At which
one of the following points (given as coordinates), the
intensity of interference will be maximum?
(a) (3lambda, 0)
(b) (4lambda,0)
(c) (5lambda/4, 0)
(d) (28lambda/3, 0) (WB JEE)​

Answer 1

Explanation:

b) (4lambda, 0)

to be considered