The frequency of light waves is the frequency at which the electric and magnetic fields oscillate.

This field oscillates in time with the current in the wire.

This electric field also oscillates in time with the original current.

Could she make the field oscillate, to convince them?

The magnetic field oscillates perpendicular to both E-field and propagation.

Light also has a polarization, which is the direction in which the electric field oscillates.

At the level of individual particles, the fields are always oscillating.

Sometimes, conditions can be arranged so that the light field and the electrons oscillate in just the right way.

The electric and magnetic fields oscillate even in vacuum.

The field oscillated, allowing the wearer to interact with his surroundings, while being protected from them.