What are electromagnetic waves?
Electromagnetic waves are transverse waves made up of a vibrating electric field and a vibrating magnetic. The two fields vibrate at right angles to one another in the direction in which the wave is traveling.
What is the Electromagnetic Spectrum?
The electromagnetic spectrum is a family of waves consisting of, gamma ray, X-rays, ultraviolet, visible light, infra-red, microwaves and radio waves.
All the waves that make up the electromagnetic spectrum travel at exactly the same speed through space (vacuum). This speed is 3 x 108 ms−1 which is the speed of light.