is using such electromagnetic wave useful in the case above
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Electromagnetic waves are used to transmit long/short/FM wavelength radio waves, and TV/telephone/wireless signals or energies. They are also responsible for transmitting energy in the form of microwaves, infrared radiation (IR), visible light (VIS), ultraviolet light (UV), X-rays, and gamma rays.
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the usefulness of electromagnetic wave can be explained only when u will post the given case please repost ur question
and do not waste ur points !!!
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