Electromagnetic waves are waves that travel without a medium. The waves used for voice and data communication are called wireless spectra.
A wireless spectrum is an electromagnetic spectrum that ranges from 20 kHz to 300 GHz to transmit the radio frequencies that are used in telecommunication.
These frequencies are invisible and travel at long distances through signals that enable the data on the internet and calls to be directed to the receiver from the sender's end.
Therefore, the wireless spectrum is the frequency range used to transmit data.
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