Final answer:
The electric and magnetic waves can have any angle between them because they are perpendicular to each other and to the direction of propagation. This is known as a transverse wave.
Step-by-step explanation:
The electric and magnetic waves can have any angle between them because they are perpendicular to each other and to the direction of propagation. This is known as a transverse wave. At any instant in time, the electric and magnetic fields are both present and oscillating, but their orientations are perpendicular.