برجراف عن الموبايل فون للصف التاسع 2024.

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اليوم جبتلكم برجراف عن الموبايل فون

Mobile Phones

This subject talks about definition, advantages and disadvantages of mobile phones. Mobile phone is a hand held device with built-in antennas often called cell phone. Mobile phones are seen as a modern invention, but they are a development of something that dates back a long way.

The biggest and most obvious change is the rapid take-up of mobile phones. Twelve years ago, they were only for the wealthy, and had a "yuppie" image. Seven years ago they were still rare. Now there are more mobile phones than households and numbers are still growing fast. We are approaching the time when it will be considered unusual not to have a mobile phone.
There are many advantages of mobiles. They are convenient to use i.e. using it anytime you need to make a call, SMS can be used when one can’t afford to call, enables one to send and receive e-mail, They are portable e.g. it can be carried from one place to another.
But the disadvantages are that children’s skulls are vulnerable to radio waves from phones which can damage their brain tissues as the nervous system is very sensitive during development. Cell phone antennas which are close to earpiece are harmful to humans due to large volumes of electro-magnetic waves that get concentrated around it during the receipt and placing of calls. Vibrating phones affect men’s reproductive system, radiation from phones also increase blood-pressure, risk of brain tumors mainly acoustic neuromas. Lab research also shows that long exposure to mobile phone on stand-by leads to serious degradation of white blood cells. They are susceptible to loss and theft. Restricting access to corporate data and applications. Non-repairable internal corrosion of parts if wet.

Vulnerable to extreme heat or cold which may cause momentary loss of screen display. Mobiles are very noisy sometimes especially when we are praying in the mosque, learning at university, or reading in libraries.