Signals that humans cannot sense directly can be detected through technological advances and designs.
Electromagnetic Technologies
Radios, televisions, cell phones and wireless computer networks are some examples of technologies that are beneficial to humans by receiving and transmitting electromagnetic waves.
Fiber Optic CablesElectromagnetic signals can be transmitted through a medium such as the air or more efficiently through fiber optic cables that can be received by technological devices such as computers that interpret the wave signals.
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Higher Frequency Waves = More Information
The higher the frequency of the wave, the more information it can carry.
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Digital Information
Signals sent and received by radios, televisions, cell phones and wireless networks are often digitized (sent as wave pulses of coded information) as a more reliable way to transmit information. When in digitized form, information can be easily recorded, stored for future recovery, and transmitted over long distances without substantial loss.
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Topic Tips
Radios, televisions, cell phones and wireless computer networks are examples of such technologies that are beneficial to humans by receiving and transmitting signals through radio waves or other electromagnetic waves.