What are mobile phones?
An electronic telecommunications device, often referred to as a cellular phone or cellphone. Mobile phones connect to a wireless communications network through radio wave or satellite transmissions. Most mobile phones provide voice communications, Short Message Service (SMS), Multimedia Message Service (MMS), and newer phones may also provide Internet services such as Web browsing and e-mail.
 How do mobile phones work? Mobile phones work using "cells". Each cell has a base station at its centre. The base station sends and recieves calls from your phone. Your phone communicates with the base station using radio waves.As your phone moves from cell to cell, your calls are transmitted from the nearest base station. | |
 Advantages of mobile phones: | |
2) Contact with others easily (convenient)
4) Have a lot of functions e.g. take photos,
listen to music….
5) Use it when you are bored
6) Have different styles and colours
7) 3G service
1) People spend less time gathering with their
family
2) Disturb our study and people’s work
3) Easily broken
4) affect our health because there are rays
5)some places cannot have service
Mobile phones and health:
A major study into the safety of mobile phones has concluded that they may affect the health of people who use them.
Research carried out by scientists in Finland suggests radiation from mobile phones causes changes in the brain.
It is the first time that scientists have looked at the effects of mobile phone radiation on human cells rather than those of rats. The two-year study concluded that even low-level emissions from handsets are damaging.
Scientists from the Radiation and Nuclear Safety Authority found that exposing human cells to mobile phone radiation damaged the blood-brain barrier - a safety barrier in the body that stops harmful substances in blood from entering the brain.
No comments:
Post a Comment