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EM Spectrum (Radio Waves (Used to transmit radio and TV programmes on…
EM Spectrum
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Gamma Rays
From radioactive substances, used to kill bacteria on food and surgical instruments, to kill cancer cells. Overexposure causes cancer.
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Infra-Red
Given out by all hot objects. Used in grills, toasters, and heaters, and to find people under rubble and snow, as well as locate marijuana in people's houses.
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Ultraviolet
Used in sunbeds to create a tanned appearance, as well as fluorescent lamps. Overexposure causes skin cancer.
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Visible Light
Detected by the eye as the colours red, orange, yellow, green, blue, indigo and violet.
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All EM waves are electromagnetic waves whose direction of energy transfer is perpendicular to the direction of travel
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