Several RF questions

Discussion in 'Off Topic' started by alekstsoy29, Jan 30, 2021.

  1. alekstsoy29

    alekstsoy29 New Member

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    1. Is visible light inherently visible? Do some animals or could some aliens have a visible spectrum in a separate section of the electromagnetic spectrum? Did the human eye evolve to see visible light because it was the only spectrum that is possible to be seen or just because that's the spectrum we happen to see?

    2. Do radio telescopes and infra cameras work the same way/work on the same principle? How far can these cameras see into the RF spectrum? Are there cameras that see ultra violet light? Can wifi signals be visualized?

    3. if light signals propagate down fiber optic cables, could RF theoretically travel through specialized fiber optic cables? usps tracking
     
    Last edited: Feb 1, 2021
  2. Roceangou

    Roceangou Active Member

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    Q: what is RF used for?
    A: Humankind communicates with artificially created radio waves that oscillate at various chosen frequencies. RF communication is used in many industries including television broadcasting, radar systems, computer and mobile platform networks, remote control, remote metering/monitoring, and many more.
     
  3. Roceangou

    Roceangou Active Member

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    Q: Is RF dangerous?
    A: The most restrictive limits on whole-body exposure are in the frequency range of 30-300 MHz where the human body absorbs RF energy most efficiently when the whole body is exposed.
     

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