Question

a wave travels in the x-direction its displacement y at point x in time t is y=0.1 sin (5x-6t) Its wavelength is? (a) π/5 (b) 2π/5 (c) π/2 (d) 5π/6 (e) 5π/3

Answer 1

Given:

$y=0.1\sin (5x-6t)$

$$y=A\sin \left(\frac{2\pi}{\lambda}x-\omega t\right)$$

The wavelength

$$\lambda=\frac{2\pi}{5}\:\rm m$$

Answer: (b) 2π/5