Question

In an electromagnetic wave, at an instant and at a particular position, the electric field is along the negative z-axis and magnetic field is along the positive x-axis. Then the direction of propagation of electromagnetic wave is

(1) at 45° angle from positive y-axis

(2) negative y-axis

(3) positive z-axis

(4) positive y-axis

Answer 1

(2) negative y-axis

Direction of propagation of EM wave will be in the direction of \(\vec{E}\times\vec{B}.\) .