A plane electromagnetic wave travels in vacuum along z-direction. Then which of the following statements is true for the electric and magnetic field vector?
1
The electric field (E) and magnetic field (H) lie in the y-z plane and they are mutually perpendicular.
2
The electric field (E) and magnetic field (H) lie in the x-z plane and they are mutually perpendicular.
3
The electric field (E) and magnetic field (H) lie in the two different planes and they are mutually perpendicular.
4
The electric field (E) and magnetic field (H) lie in the x-z plane and they are parallel to each other.