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What are radiowaves?Give their two uses....

What are radiowaves?Give their two uses.

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Radio Waves : These are the electromagnetic waves having wavelength from `0*3` to few kilometers and their frequency range from `3xx10^(14)` to `3xx10^(7)` Hz.
Uses of radio waves :
(i) These are used in radio and television communication.
(ii) There are used in radars.
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