Question

Consider an electromagnetic wave traveling in the positive y-direction. The magnetic field associated with the wave at some location at some instant points in the negative x-direction as shown in the figure. What is the direction of the electric field at this position and at this instant?

(a) the positive x-direction

(b) the positive y-direction

(c) the positive z-direction

(d) the negative z-direction

(e) the negative y-direction