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EM waves
communication and their uses
Question | Answer |
---|---|
what does EM stand for? | electromagnetic |
what are the EM waves from lowest frequency to highest frequency? Rabbits Meet In Very Unusual eXpensive Gardens | radio waves, microwaves, infra-red, visible light, ultraviolet, x-rays, gamma rays |
what are microwaves used for? | satellite communication and mobile phones |
what are infra-red waves used for? | remote controls and optical fibres (used over phone lines) |
what is visible light used for? | photography |