If the magnetic field of an electromagnetic wave is in the +-direction and the electric field of the wave is in the +-direction, the wave is traveling in the
Then in Electromagnetic wave the electric field & magnetic field are mutually perpendicular to the direction of propagation of the wave.
Poynting vector is ,
S = (1/mu_o) E X B
X represents -- cross product of E and B
curl our right hand fingers from E to B then our thumb indicates the direction of the motion of the wave.
curl our fingers from + to +,
curl our fingers from +y to +x , then my right thumb points in -z direction.
the wave is traveling in the... xy -plane.
then the answer is xy- plane.
Then second last (d) option is correct .
I hope help you !!
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