Cell phone radiation and its properties and health hazards

By BR -

The radio waves that send the encoded signal are made up of
electromagnetic radiation propagated by the antenna. The function of an
antenna in any radio transmitter is to launch the radio waves into
space; in the case of cell phones, these waves are picked up by a
receiver in the cell-phone tower.

Electromagnetic radiation is made up of waves of electric and magnetic
energy moving at the speed of light, according to the Federal
Communications Commission (FCC). All electromagnetic energy falls
somewhere on the electromagnetic spectrum, which ranges from extremely
low frequency (ELF) radiation to X-rays and gamma rays.

check the attachement for spectrum

There are two types of electromagnetic radiation:

* Ionizing radiation - This type of radiation contains enough
electromagnetic energy to strip atoms and molecules from the tissue and
alter chemical reactions in the body. Gamma rays and X-rays are two
forms of ionizing radiation. We know they cause damage, which is why we
wear a lead vest when X-rays are taken of our bodies.

* Non-ionizing radiation - Non-ionizing radiation is typically safe.
It causes some heating effect, but usually not enough to cause any type
of long-term damage to tissue. Radio-frequency energy, visible light and
microwave radiation are considered non-ionizing.

If you are worried about the potential hazards of cell-phone radiation,
here are few ways to reduce your risk:

* Use a hands-free headset.
* Use a phone that places the antenna as far away from you as
possible.
* Extend the antenna during use.
* Limit calls inside buildings.
* Use the phone in open spaces as often as possible.
* Limit use by children.

Radiation levels are tested based on the specific absorption rate (SAR),
which is a way of measuring the amount of radio-frequency energy that is
absorbed by the human body. In order to gain an FCC license, a phone's
maximum SAR level must be less than 1.6 watts per kilogram (W/kg). In
2000, the Cellular Telecommunications & Internet Association (CTIA)
ordered cell-phone manufacturers to place labels on phones disclosing
radiation levels.

To find the specific absorption rate of your phone, you can visit this
FCC Web site http://www.fcc.gov/oet/ea/
Your phone should have an FCC identification code. Type that code in the
correct field and the site should offer information on your device.

It's still unclear as to whether cell phones actually cause any
significant damage to the human body. Studies continue to contradict one
another on the issue. Additional studies may shed some light on the true
effects of cell-phone radiation, but will likely only confuse consumers
even further. In the meantime, millions of cell-phone users take
whatever risk may be involved in using the devices.

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