CBSE Class 12-science Answered

A time varying electric field acts as a source of magnetic field (Ampere's law)and a time-varying magnetic field acts as a source of electric field(Faraday's law).

Thus if either an electric or magnetic field is changing with time, a field of the other kind is induced in adjacent regions of space.

If a charged particle is accelerating, the electric field lines from it are varying in space around it. This in turn produces a changing magnetic field. So a time varying electric and magnetic field, that can propagate through space from one region to another exists.