Electromagnetic properties
When a spark jumps across two charged spheres, electromagnetic waves (Light) are
generated. These waves can be detected by placing two un-charged spheres in the
path of the waves. The sparks produced are a carbon copy of the of the first.
Radio transmitters and receivers work on this principle. It can also be
shown that light travels in little bursts of particles. These particles known as
Photons carry energy from one place to another
Members of the electromagnetic spectrum have wave like properties which can carry energy and show interference patterns. Waves can result from electrons undergoing some kind of energy change, e.g. Radio waves are emitted when electrons are accelerated in an aerial.
They are regarded as a combination of travelling electric and magnetic fields which vary in value and are directed at right angles to each other and to the direction of travel, these are known as transverse waves.
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