Chapter 4

Electromagnetic radiation
Electromagnetic radiation is energy that is sent out of a radiation source in the form of light waves or particles.

The waves of energy are called electromagnetic because they have both electric and magnetic characteristics.

Examples of electromagnetic radiation include: radio waves, microwaves, visible light and x rays.

These next pages will cover the topic of electromagnetic radiation:
 * Light waves
 * Particles
 * The relationship between the speed of light, frequency and wavelength
 * The electromagnetic spectrum
 * Spectrum
 * Space
 * Northern lights
 * The greenhouse effect
 * The Ozone Layer