Thursday, 28 April 2011

3.12, 3.13

USES
- Radio waves: broadcasting and communications
- Microwaves: cooking and satellite transmissions
- Infrared: heaters and night vision equipment
- Visible light: optical fibres and photography
- Ultraviolet: fluorescent lamps
- X-Rays: observing the internal structure of objects and materials and medical applications
- Gamma Rays: sterilising food and medical equpiment

DAMAGES
- Microwaves: internal heating of body tissue
- Infrared: skin burns
- Ultraviolet: damage to surface cells and blindness
- X-Rays: cancer, mutation
- Gamma Rays: cancer, mutation



Radio
Microwaves
Infrared
Visible
Ultraviolet
X-rays
Gamma rays



WAVELENGTH: longest --> shortest as you go down the column
FREQUENCY: lowest --> highest as you go down the column

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