Electromagnetic waves are propagated by oscillating electric and magnetic fields oscillating at right angles to each other.Electromagnetic waves travel with a constant velocity of 3 x 108 ms-1 in vacuum.
the waves are not deflected by electric or magnetic field.
the waves can show interference or diffraction.
the waves are transverse waves.
the waves may be polarized.
Electromagnetic waves need no medium of propagation. The energy from the sun is received by the earth through electromagnetic waves.