What oscillates in an electromagnetic wave?

What are electromagnetic waves?

The electric and magnetic fields in an electromagnetic wave are

Can electromagnetic waves be polarised?

An electromagnetic wave is travelling in a medium with a velocity vecv=v hati . The electric field oscillations, of this electromagnetic wave, all along the Y-axis. Identify the direction in which the magnetic field oscillations are taking place of the e.m. wave.

What are the uses of electromagnetic waves?

What is the speed of electromagnetic wave?