An electromagnetic wave is represented by the electric field $E=E_0 n \sin [\omega t+(6 y-8 z)]$. Ta

Question

An electromagnetic wave is represented by the electric field $E=E_0 n \sin [\omega t+(6 y-8 z)]$. Taking unit vectors in $x, y$ and $z$ directions to be $l, j, k$, the direction of propagation $s$ is

Professor PC Thomas Classes · Answer

Wave propagates in direction of $\vec{k}$. Here $\vec{k} \propto -(6\hat{j} - 8\hat{k})$, giving direction $s = \frac{-3\hat{j}+4\hat{k}}{5}$. [FLAG: Options sign check]