Electro Magnetic Waves
Electro-Magnetic Radiation
Introduction
All objects in our universe give off light, or electro-magnetic radiation. The particle of light is called the Photon. It is characteristics of both a wave and a particle. Photons are characterized by their energy and their wavelength, or their frequency.
Light can be thought of as a wave which travels at a certain velocity. The velocity of light. Like an ocean wave, or a sound wave, the light waves can change …
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…but some penetrates and causes sunburn
3. Used in laboratories to mutate cells
Optical
1. Penetrates the atmosphere and can be seen with our eyes
2. 300-100 nm
4. Colors of the rainbow
5. Sunsets
White light is a mixture of all colors. Blue light has a short wave length and red light has long wavelengths
Infra-red
1. Longer than red light
2. Some penetrates the atmosphere. Can be felt as heat.
Radio
1. Atmosphere is transparent to radio waves.
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