Question

Radiation of mobile effects on human body in easy language

Answer 1

gghCell phones have to emit a small amount of radiation just to operate. They emit signals via radio waves that are comprised of radio-frequency (RF) energy, which is a form of electromagnetic radiation. Cell phones are generally placed against the ear, and therefore there is a possibility that some of this radiation will be absorbed by human tissue. However studies have shown that the radiation generated is negligible. 

There are two kinds of electromagnetic radiation. Ionising radiation has enough energy to change chemical reactions in the body. X-rays and Gamma rays are examples of this. It is known that ionisation radiation is harmful, and that is why lead is used to protect the body during x-rays. Non-ionising radiation is known to have some heating effect, but without long-term damage caused to the body. RF energy, microwaves and visible light are examples of non-ionising radiation

The rise in temperature of the surface of the brain caused by RF radiation from cell phones is no more than 0,3 degrees, while the brain naturally fluctuates about 1 degrees up or down. Damage to the brain cells is only caused when there is at least a 5 degrees rise in temperature. Therefore the heat effects of RF radiation can be seen as harmless to humans. 

High levels of RF radiation can damage human tissue by heating it. The eyes in particular are susceptible because of the low blood flow in the area. There is also concern about the long-term effects of non-ionising radiation, but there is not much evidence to support this because cell phones have only become popular in the last 12 years or so. Although, so far tests like in Norway have not shown an increase in cancer in the group of 420,000 mobile phone users compared to the expected cancer rate of the population. However, mobile companies funded this study, and its reliability can therefore be questioned. 

Answer 2

All objects with a temperature above absolute zero (0 K, -273.15 oC) emit energy in the form of electromagnetic radiation. A blackbody is a theoretical or model body which absorbs all radiation falling on it, reflecting or transmitting none.