Electromagnetic Spectrum
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what is an electromagnetic wave?
a transverse wave consisting of oscillating electric and magnetic fields that oscillate 90 degrees to each other
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Radio waves, Micro wave, Infrared radiation, visible Light, Ultraviolet radiation, X ray, Gamma ray
Speed of EM waves
travel at same speed in vacuum, 3 x 10^8
Do EM waves carry an electrical charge?
No
Main uses of radio waves
radios, over-the-air television and communication
Main uses of microwaves
microwave ovens, satellite television and Global Positioning System (gps)
Main uses of infrared radiation
remote controllers, ear thermometers, intruder alarms
main uses of visible light
optical fibres for medical uses and telecommunication
main uses of uv radiation
sunbeds and sterilisation of equipment
main uses of x-rays
radiological and engineering applications (RT, medical diagnosis through x-ray image, detecting flaws in heavy metal equipment)
main uses of gamma rays
medical treatment (killing cancerous cells in radiation therapy)