posted on Jan, 31 2010 @ 04:45 AM
Originally posted by aristocrat2
Medical evidence shows that there is a severe cancer risk posed by mobiles and that heating of the brain can be detected within 15 minutes or so of
use of a mobile phone.
Medical evidence shows no such thing.
Cellphones operate using what is called non-ionizing radiation, which ranges from near-ultraviolet radiation, to visible light, to infrared radiation,
to microwave radiation, to radio-frequency radiation, to static fields (caused by magnets). All of these are considered non-mutagenic. Note that
there is also mid- and far-ultraviolet, which are mutagenic, and are kinds of ionizing radiation.
Electrical fields (such as those generated by microwaves and radio-frequency waves) can cause what is known as dielectric heating. A dielectric
material is simply a material that can be polarized by an electric field. Human tissues are a dielectric material. Studies have shown that
cellphones can cause heating of tissues. They have, however, only shown that this occurs on the surface of the skin. For one thing, the heating is
only a fraction of a degree, as cellphones have no real power behind them. Second, the skull is sufficient to block this effect from ever reaching
There is one caveat: the skin can regulate it's own temperature; this is called homeostasis. The eye, however does not. One study found that a
100W/kg radio-frequency wave at a rabbit's eye for a couple of hours caused cataracts. For comparison, a cellphone operates at 1.6W/kg. That's
about 100 times less.
No study has conclusively linked cellphone use to cancer. The only results have either been negative (as in, "No it doesn't cause cancer.") or
inconclusive (as in, "The data doesn't really tell us anything.")
All that being said, I had a feeling cellphone usage was replacing land-line usage. But I doubt it will keep falling at that rate. I'm sure there
are some areas, even in the US, where cellphones are still just too expensive.