There are the following characteristics of electromagnetic waves:
(i) Electromagnetic waves are propagated by oscillating electric and magnetic fields oscillating at right angles to each other.
(ii) Electromagnetic waves travel with a constant velocity of 3×10−8 ms−1 in vacuum.
(iii) Electromagnetic waves are not reflected by electric or magnetic field.
(iv) Electromagnetic waves can show reflection and refraction just like light waves.
When e.m strikes to the source of conducting material. they are reflected back as shown in the given diagram.
When e.m waves enters from one medium to another, it bends towards the normal or away from normal while travelling in next medium