How are the component fields of an electromagnetic wave oriented?

Electromagnetic waves are composed of two distinct, oscillating fields: an electric field (the E-field) and a magnetic field (the H-field). These fields are responsible for the propagation of radio signals through space. By the laws of physics, specifically Faraday's and Ampere's laws, a changing electric field produces a magnetic field, and vice versa. For this self-sustaining propagation to occur, the two fields must physically orient themselves completely perpendicular to one another. Therefore, the E-field and H-field are always physically oriented at right angles to each other. It is important to note that while they are 90 degrees apart in physical space, they actually peak and cross zero at the exact same time, meaning they are perfectly in phase with each other in time.