The eletromagtic(EM)spectrum is made up of different
types of radiations.These radiation consist of oscillating
electric and magnetic fields of different frequencies.
Electromagtic radiations transmit energy through
space as a wave. Visible light that comes from a lamp
in your house and radio waves that come from a
radio station are two types of electromagnetic
radiation.
Other examples of EM radiations are microwaves,
infrared and ultraviolet light, X-rays and gamma
arys.