when an electric field combines with an magnetic field, it forms an electromagnetic wave. also, an...

ELECTROMAGNETIC WAVES

When an electric field combines with an magnetic field, it forms an electromagnetic wave. Also, an electromagnetic wave does

not need a medium to pass through.

Wave Types

There are 7 different types of electromagnetic waves.

Radio Waves Microwaves Infra Red Waves Visible Light Rays Ultra Violet Waves X-ray Waves Gamma Rays

Radio Waves

Radio waves are mainly used for communications and in the electromagnetic spectrum they have the lowest frequencies.

Ex - An old FM/AM radio. Ex – An antennae from a Television. Pictures -

Microwaves

Microwaves makes substances hot by causing water and fat molecules to vibrate.

Ex – A microwave Ex – Mobile phones Pictures -

Infra Red Waves

Infra red waves give off by heat. Ex – Lamps Ex – Security lights Pictures -

Visible Light Rays

Visible light rays is anything hot enough to glow.

Ex - Light bulb Ex - Cinema Projectors Pictures -

Ultra Violet Waves

Ultra Violet waves are from special lamps. Ex - Tanning bed Ex - UV lamps Pictures -

X-ray Waves

X-ray waves pass through most substances.

Ex – Stars Ex – X-ray machines Pictures -

Gamma Rays

Gamma rays carry large amounts of energy and are used to kill of cancer.

Ex – Radio therapy Ex – Scintigram Pictures -

Mechanical Wave

Mechanical waves needs a medium to pass through.

Ex – A flag waving in the air is a mechanical wave because the air passes through the flag.

Ex – A pond making waves after a rock has been thrown in has mechanical waves because the waves pass through water.

Pictures -