Question

A sine wave of wavelength $\lambda$ is travelling in a medium. The minimum distance between the two particles, always having same speed, is

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

Answer 1

The correct option is B $\frac{\lambda }{2}$

Slope at $A$ and $B$ is zero and the velocity at $A$ and $B$ will be same.
The minimum distance between the two particles having same speed is $\frac{\lambda }{2}$.
Final answer: $\left(c\right)$