Radio waves: broadcating and communication (radios)
Microwaves: Cooking and satelite communication
Infrared: Heaters and night vision
Visible light: to see and for photography
Ultraviolet: Fluorescent lamps
x-rays: observing inner structures of materials and objects (xray scanner in a hospital)
Gamma rays: sterilising food and medical equipment
Dangers
Microwaves: Internal heating of body tissue
Infrared: Skin burns
Ultraviolet: Damage to surface cells and blindness
Gamma rays: Cancer and mutation (similar with xrays but not as bad)
good
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