What is the difference between Wi-Fi, long-distance radio, and cell phone technology?

Discussion in 'Community Discussion' started by applefan289, Nov 7, 2011.

  1. applefan289 macrumors 68000

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    #1
    Just wondering what the difference is, and whether Wi-Fi emits more or less radiation than long-range radio frequency, like what is used to listen to FM radio.
     
  2. ComputersaysNo macrumors 6502

    ComputersaysNo

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  3. Rodimus Prime macrumors G4

    Rodimus Prime

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    #3
    the frequency is what is different.

    Wifi is going to be 2.4 or 5 Ghz.

    Cell radio is at 2.1 Ghz or less. Most of it less. 2.1 is the high range.

    Radio in your car on FM it highest frequency is around 110 Mhz (0.110 Ghz) and lowest around 87 Mhz. That is for FM.
     
  4. applefan289 thread starter macrumors 68000

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    #4
    So it sounds like Wi-Fi would be of most danger then? But how come I hear that cell phone frequency is what's being questioned as dangerous?
     
  5. Rodimus Prime macrumors G4

    Rodimus Prime

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    #5
    Higher frequency does not always mean dangerous. It more about energy levels.

    By your school of thought visible light is a lot more dangerous than Wifi as it is at even higher frequencies. Red light starts at 400 Thz
     
  6. firestarter macrumors 603

    firestarter

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    WiFi transmitters (in your computer) are about 100mW.

    Radio transmitters for audio broadcasts can be thousands of kilowatts.

    So thats a million times difference in power!
     
  7. Tomorrow macrumors 604

    Tomorrow

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    I think the people who fear cell phone radiation do so more because of its proximity to your head than the frequency.
     
  8. Intell macrumors P6

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    The ones that pose the greatest danger are radiation waves, like gamma/X-Rays. These are really high, around 300Ehz. But the the frequencies you posted don't pose any threat, as per recent research.
     
  9. MacNut macrumors Core

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    #9
    FM and AM radio has the strongest signal, the most powerful AM transmitter aloud is 50,000 watts. Cell phone is short wave and only as powerful as the nearest cell tower. Wifi is maybe 500 feet max. In all of these the dangerous power is right near the tower. Wifi is about as dangerous as your cordless phone or microwave oven.

    The reason cell phones are considered dangerous is that you are holding a transmitter right to your head for sometimes hours at a time.
     
  10. MOFS macrumors 65816

    MOFS

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    #10
    The reason why cell phones are considered dangerous is based on hearsay and a lack of a strong meta-analysis confirming this, so say Cancer Research UK.

     
  11. iJohnHenry macrumors P6

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    #11
    So, perhaps?

    Just to be safe, use a blue-tooth/hands-free device.

    Blue-tooth only has to work for a few feet, to the phone.
     
  12. MOFS macrumors 65816

    MOFS

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    #12
    Bluetooth? The wireless standard, using, er, waves of some sort.:p

    Anyhow, reading the article, it is only a possible because of the difficulty in being certain, rather than a case of the evidence leaning towards them being dangerous..
     
  13. iJohnHenry macrumors P6

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    Sure, but only enough power to get to your pocket/purse/backpack.

    Not the nearest cell tower. :p
     
  14. steve2112 macrumors 68040

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  15. applefan289 thread starter macrumors 68000

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    #15
    Thanks for the answers.

    So if someone has symptoms of palpitations, and that person claims it's due to Wi-Fi, would that person be wrong? The person would have lived their whole life with powerful FM radio transmitters, so some Wi-Fi in a room shouldn't be an issue, right?

    BTW I would not like to see the radiation levels in an Apple store - it's practically a soup of wireless frequencies in there. :eek:
     
  16. MOFS macrumors 65816

    MOFS

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    #16
    :rolleyes:

    Why would palpitations be most likely caused by Wi-Fi. As a doctor, I would think (deep breath...) claustrophobia,anxiety,hyperthyroidism,medication,heartattack,UFOlanding all before Wi-Fi. There is no evidence that radio waves cause problems, and in layman's speak that means that most likely they don't. Your local Apple store is as safe as your local clothes shop.
     
  17. applefan289 thread starter macrumors 68000

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    #17
    One thing I do know is that my 27-inch iMac gives me headaches, and I leave it on the lowest brightness setting. :rolleyes:
     
  18. firestarter macrumors 603

    firestarter

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    #18
    Have you had your eyes tested? You might be longsighted.
     
  19. iJohnHenry macrumors P6

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    #19
    Can you adjust the refresh rate. This can cause a problem for some people.
     
  20. applefan289 thread starter macrumors 68000

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    #20
    Oh, how would I do that in Lion? It doesn't seem to be in the Display settings. Would I have to use the calibrator? Would a higher refresh rate help?
     
  21. iJohnHenry macrumors P6

    iJohnHenry

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    #21
    Don't have Lion, so no help there.

    I just know that some people are very sensitive to certain refresh rates.

    And that might have been for the old CRT displays??

    Someone with Lion experience will be along shortly. ;)
     
  22. yg17 macrumors G5

    yg17

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    #22
    If they're having palpitations, it's due to a medical condition and they need to see a doctor, not unplug the WiFi router.

    Refresh rates don't apply to LCDs. Only CRTs. Go see an eye doctor.
     
  23. firestarter macrumors 603

    firestarter

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    #23
    I don't think you can. You used to be able to with CRT monitors, but that isn't how LCDs work.

    Seriously, get your eyes checked out. Even small uncorrected sight defects can cause headaches quickly if you're straining your eyes looking at something too close or far away (I wear glasses and I know this from experience!!).
     
  24. applefan289 thread starter macrumors 68000

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    #24
    I have astigmatism in my left eye (very slight blurry vision, close and far), but I've had that for a long time. I was on my prior Windows computer for hours (19" LCD monitor), but the contrast and brightness (and obviously size) was less intense because I had it on the lowest settings. I don't want to mess with the calibration of the iMac, so I just put the brightness all the way down. It's still quite intense.

    It could be that I need glasses, but I don't want them because my vision is pretty good. It may not be good enough though, hence my headaches.
     

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