Q 11-14-124JEE MainJEE Main 2019 (12 Jan, Shift 1)Easy
A travelling harmonic wave is represented by the equation $y(x, t) = 10^{-3}\sin(50t + 2x)$, where $x$ and $y$ are in meter and $t$ is in seconds. Which of the following is a correct statement about the wave?
Answer: (C) The wave is propagating along the negative $x$-axis with speed $25\ \text{m s}^{-1}$
The form $\sin(\omega t + kx)$ travels towards negative $x$.
$$v = \frac\omega k = \frac{50}{2} = 25\ \text{m/s}$$
Solution by Sreeraj P, M.Sc Physics