Electromagnetic wave consists of periodically oscillating electric and magnetic vectors:

in mutually perpendicular planes but vibrating with a phase difference of π in mutually perpendicular planes but vibrating with a phase difference of $\frac{π}{2}$ in randomly oriented planes but vibrating in phase in mutually perpendicular planes but vibrating in phase

in mutually perpendicular planes but vibrating in phase

Electromagnetic wave consists of periodically oscillating electric and magnetic vectors in mutually perpendicular planes but vibrating in phase.