Question

Two waves being produced by two sources $S_{1}$and $S_{2}$. Both sources have zero phase difference and have wavelength λ. The destructive interference of both the waves will occur of point P if $(S_{1}P - S_{2}P)$ has the value

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

Answer 1

Answer: (D)

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

Answer 2

For destructive interference, path difference the waves meeting at P (i.e. $S_{1}P - S_{2}P)$ must be odd multiple of λ/2. Hence option (4) is correct.]