2007-01-30 18:38:33 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Radiowaves, also known as (RF) radio freqency fields, are a form of invisible electro magnetic energy similiar to light waves. The electromagnetic spectrum ( the range of all kinds of elctric, magnetic & visible energy) stretches from low frequency to radio waves, microwaves, infrared & invisible light thro' to high frequency x-rays and gamma rays.
For over a century, technology has enable us to use in devices we rely upon everyday life, including remote control, radio controlled models, electric & electronic equiipments, mobile and cordless phones.
The (RF) radio frequency used in mobile phones, is non ionising, which means that it passes thro matter, including the human body without altering it. The infrared sensor installed in the mobile phones serve manily as remote control for various gadgets, including data transmission.
Hope this helps you.
2007-01-30 20:00:49 · answer #1 · answered by radiance 3 · 1⤊ 0⤋
I wasn't aware of phones using infrared. However, infrared used in electronic devices is totally safe and totally invisible. You would have to be putting out light on a pretty massive scale for it to start registering as heat.
2007-01-31 02:45:41 · answer #2 · answered by mazaker2000 3 · 1⤊ 0⤋
I am unaware that infrared is used in cell phones at all. It there is any there, there are federal regulations that cover emitted power and limit eye exposure. But, I don't think you have any infrared, so that is all moot.
2007-01-31 02:44:13 · answer #3 · answered by ZORCH 6 · 1⤊ 0⤋
I believe that you mean RF and not infra red. There is no infrared emission in cell phones.
2007-02-04 06:43:22 · answer #4 · answered by Anonymous · 1⤊ 0⤋
No, power is very low and it is not focused like in lasers, but can be if u stick your eye directly and very close to the beam for a long time....
2007-01-31 03:32:56 · answer #5 · answered by John B 2 · 1⤊ 0⤋
No because its power is very law.
2007-01-31 02:43:04 · answer #6 · answered by Anonymous · 1⤊ 0⤋
no it would have to have a warning
2007-02-07 18:09:21 · answer #7 · answered by Brandon S 1 · 1⤊ 0⤋