Uses for EM Waves

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11 Terms

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Radio Waves

-Radio and TV broadcasts

-Aircraft communication

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Microwaves

-Satellite communication

-Microwave cooking

- Cellular phones

-RADER in speed traps and systems in air traffic control

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Infrared

-TV remote controls

-Optical fibers

-Conventional ovens

-Lasers

-Infrared scanners which detect heat

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Visible light

-Photosynthesis

-Seeing things around us

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Ultraviolet

-Fluorescent lights

-Sterilise surgical equipment and food

-Kills Microbes in food

-Security markings (money)

-Sun beds

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X-rays

-Medical imaging

-Security checks

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Gamma

-CT scans

-Treatment for cancer

-Nuclear reactors

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Properties of EM Waves

-travel through vacuum

-travel at the same speed 3×10^8

-refracted, reflected, diffraction

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Wave Model

-Reflection, Refraction, Diffraction, Interference

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Particle model

-light waves act as particles “photons”

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Photons

Packet of energy found in light