The Electromagnetic Spectrum
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... adiation - it is produced by vibrating atoms. The hotter atoms are, the faster they vibrate so more radiation is emitted. Food can be cooked using infra-red grills, but they do not penetrate food more than a few millimetres below the surface like microwaves do. Toasters heat bread with infra-red radiation. Sunlight contains the electromagnetic waves from infra-red to ultra-violet. Some infra-red radiation is absorbedby the skin, this makes you warm but excessive exposure can cause burns.
Ultra-violet Ultra-violet lies just beyond the blue region of the visible spectrum and can cause tanning and the p ...
