Question

Two waves originating from sources $S_1$ and $S_2$ having zero phase difference and common wavelength $\lambda$ will show complete destructive interference at a point P if $(S_{1}P-S_{2}P)=$

• A. $5\lambda$
• B. $\frac{3\lambda }{4}$
• C. $\frac{4\lambda }{2}$
• D. $\frac{11\lambda }{2}$

Answer 1

Answer: (D)

$\frac{11\lambda }{2}$

Complete destructive interference at $(2n-1)\frac{\lambda }{2}$
So, all to option it will be $\frac{11\lambda }{2}$