मिथ या यथार्थ ?
मिथ :मोबाइल फोन्स और मोबाइल टावर्स से निकलने वाला विकिरण सेहत के लिए नुकसानदायक है यहां तक की यह कैंसर समूह के रोगों की भी वजह बन सकता है।
यथार्थ :महज़ मिथ है ऐसा मानना बूझना। मोबाइल फोन्स से निसृत विकिरण विद्युत चुंबकीय विकिरण की जिस परास के तहत आता है जितनी फ्रीक्युवेंसी का होता है वह न तो हमारी कोशाओं की टूट फुट की वजह बनता है न ही अणुओं से इलेक्ट्रोन को बे दखल करके आयनीकरण करता है जैसे की अल्फा विकिरण करता है या अन्य आयनकारी विकिरण करते हैं आयन बनाकर।
Radiations emitted by mobile phones and towers do not cause any
health hazard, experts said here Thursday. Myths without any
reasonable scientific basis have been floated by people with vested
business interests that electromagnetic field emissions (EMF) cause
health hazard, they said. Rigorous and independent scientific
studies across the globe have been carried out to dispel the fear of
health hazard from mobile tower antenna and phones. Experts
were
speaking at a panel discussion on "Mobile network and public
health" organised by the COAI, a leading mobile communications
association. They stressed that people, who believe that radiations
are really harmful, are not fully aware and should understand this
perception clearly. "Ionising radiation causes damages to the
molecules - they break the chemical bonds and can cause health
hazards. But non-ionising radiation from mobile tower and antenna
do not cause the breakage of bonds and do not cause damage to
the
molecules," said R.V.Hosur, senior professor, Chemical Science,
Tata Institute of Fundamental Research. "A number research and
studies have been conducted around the globe to ascertain if there
is any relationship between the radiation emission from the mobile
phone and cancer. However there is no enough evidence providing
mobile phones causes cancer in humans," he added. According to
the World Health Organisation (WHO), over six billion people use
mobile phones to communicate with one another. "The radiation
waves used in the mobile phones technology are probably at the
lowest end of the electromagnetic spectrum and do not cause any
health hazard," said Rakesh Jalali, Radiation Oncologist at Tata
Medical Centre.
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मिथ :मोबाइल फोन्स और मोबाइल टावर्स से निकलने वाला विकिरण सेहत के लिए नुकसानदायक है यहां तक की यह कैंसर समूह के रोगों की भी वजह बन सकता है।
यथार्थ :महज़ मिथ है ऐसा मानना बूझना। मोबाइल फोन्स से निसृत विकिरण विद्युत चुंबकीय विकिरण की जिस परास के तहत आता है जितनी फ्रीक्युवेंसी का होता है वह न तो हमारी कोशाओं की टूट फुट की वजह बनता है न ही अणुओं से इलेक्ट्रोन को बे दखल करके आयनीकरण करता है जैसे की अल्फा विकिरण करता है या अन्य आयनकारी विकिरण करते हैं आयन बनाकर।
Ionizing & Non-Ionizing Radiation
Radiation having a wide range of energies form the electromagnetic spectrum, which is illustrated below. The spectrum has two major divisions:
Radiation that has enough energy to move atoms in a molecule around or cause them to vibrate, but not enough to remove electrons, is referred to as "non-ionizing radiation." Examples of this kind of radiation are sound waves, visible light, and microwaves.
Radiation that falls within the ionizing radiation" range has enough energy to remove tightly bound electrons from atoms, thus creating ions. This is the type of radiation that people usually think of as 'radiation.' We take advantage of its properties to generate electric power, to kill cancer cells, and in many manufacturing processes.
The energy of the radiation shown on the spectrum below increases from left to right as the frequency rises.
| Types of Radiation in the Electromagnetic Spectrum | |
|---|---|
   | |
| Type of Radiation | |
| Effects | |
Source | |
Non-ionizing Radiation
We take advantage of the properties of non-ionizing radiation for common tasks:
- microwave radiation telecommunications and heating food
- infrared radiation infrared lamps to keep food warm in restaurants
- radio waves broadcasting
Non-ionizing radiation ranges from extremely low frequency radiation, shown on the far left through the audible, microwave, and visible portions of the spectrum into the ultraviolet range.
Extremely low-frequency radiation has very long wave lengths (on the order of a million meters or more) and frequencies in the range of 100 Hertz or cycles per second or less. Radio frequencies have wave lengths of between 1 and 100 meters and frequencies in the range of 1 million to 100 million Hertz. Microwaves that we use to heat food have wavelengths that are about 1 hundredth of a meter long and have frequencies of about 2.5 billion Hertz.
Ionizing Radiation
Higher frequency ultraviolet radiation begins to have enough energy to break chemical bonds. X-ray and gamma ray radiation, which are at the upper end of magnetic radiation have very high frequency in the range of 100 billion billion Hertz and very short wavelengths 1 million millionth of a meter. Radiation in this range has extremely high energy. It has enough energy to strip off electrons or, in the case of very high-energy radiation, break up the nucleus of atoms.
Ionization is the process in which a charged portion of a molecule (usually an electron) is given enough energy to break away from the atom. This process results in the formation of two charged particles or ions: the molecule with a net positive charge, and the free electron with a negative charge.
Each ionization releases approximately 33 electron volts (eV) of energy. Material surrounding the atom absorbs the energy. Compared to other types of radiation that may be absorbed, ionizing radiation deposits a large amount of energy into a small area. In fact, the 33 eV from one ionization is more than enough energy to disrupt the chemical bond between two carbon atoms. All ionizing radiation is capable, directly or indirectly, of removing electrons from most molecules.
There are three main kinds of ionizing radiation:
- alpha particles, which include two protons and two neutrons
- beta particles, which are essentially electrons
- gamma rays and x-rays, which are pure energy (photons).
Radiations emitted by mobile phones and towers do not cause any
health hazard, experts said here Thursday. Myths without any
reasonable scientific basis have been floated by people with vested
business interests that electromagnetic field emissions (EMF) cause
health hazard, they said. Rigorous and independent scientific
studies across the globe have been carried out to dispel the fear of
health hazard from mobile tower antenna and phones. Experts
were
speaking at a panel discussion on "Mobile network and public
health" organised by the COAI, a leading mobile communications
association. They stressed that people, who believe that radiations
are really harmful, are not fully aware and should understand this
perception clearly. "Ionising radiation causes damages to the
molecules - they break the chemical bonds and can cause health
hazards. But non-ionising radiation from mobile tower and antenna
do not cause the breakage of bonds and do not cause damage to
the
molecules," said R.V.Hosur, senior professor, Chemical Science,
Tata Institute of Fundamental Research. "A number research and
studies have been conducted around the globe to ascertain if there
is any relationship between the radiation emission from the mobile
phone and cancer. However there is no enough evidence providing
mobile phones causes cancer in humans," he added. According to
the World Health Organisation (WHO), over six billion people use
mobile phones to communicate with one another. "The radiation
waves used in the mobile phones technology are probably at the
lowest end of the electromagnetic spectrum and do not cause any
health hazard," said Rakesh Jalali, Radiation Oncologist at Tata
Medical Centre.
http://timesofindia.indiatimes.com/followceleb.cms?
alias=Cancer,technology,radiations,mobiles phones,healthPost a
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