The electric field of plane electromagnetic wave in vacuum is represented by $\vec{E}_x = 0;\vec{E}_y = 0.5 cos[2\pi × 10^8(t -x/c)]\vec{E}_z = 0 $ What is the direction of propagation of electromagnetic waves?

Along x - z direction Along y- direction Along x- direction Along y - z direction

Along x- direction

Equation second shows that the electromagnetic wave travels along the positive x-axis