Advantages And Disadvantages Of Mobiles

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Types of Waves Used by Mobile Phones Cell phones use radio waves to emit signals. These waves have electromagnetic spectrum longer than infrared light and frequency smaller than 3 ×109 Hz. These waves have a very low frequency when compared to waves like X-rays and gamma rays. When using a cell phone the sound energy from your voice is converted to an electric energy. This electric energy causes a current to flow which induces an electromagnetic field around the wire. The field causes a wave to be emitted outward from the antenna of the phone. The wave that is produced is a sine wave; by varying the frequency of this wave other waves can be produced. Due to the weak power from these waves cell phone networks, phone masts or base stations are…show more content…
Waves can be reflected or absorbed by objects between it and the mast, which could affect the signal quality. For this reason one does not get signal in a valley as there is not a clear pathway from the phone to the phone mast. The masts are able to service a hexagonal area around it, which allows a group of them to create a grid pattern where a greater range is serviced. Advantages and Disadvantages of Radio Waves The advantages of radio waves are that wireless communication is possible and information is able to be instantaneously transferred. It makes devices such as the cell phone, TV and GPS’s possible. Due to it being wireless communication it often serves as one of the cheaper methods of communication. The construction of cell phone towers is less labour intensive and cheaper to build than telephone infrastructure. Some studies also suggest that long-term cell phone radiation can protect against Alzheimer’s disease. Scientists have found in an experiment with mice exposed to the electromagnetic waves from cell phones causes an increase of the temperature in the brain which allows the brain cells to release a protein associated with Alzheimer’s…show more content…
Sending microwave radio frequencies through an electromagnetic field into a dielectric material, such as water, creates radio frequency heating at the molecular level of water. Through this dielectric heating the water molecules are constantly moving and it is this kinetic energy which is later dissipated into heat. Because Earth’s electromagnetic field points directly towards the North Pole the radio frequency heating is directed towards the Polar Ice Caps. Microwave radio frequencies pass through our atmosphere and because the wattage levels are low, warming is caused by a constant flow of waves that are never turned off. It is similar to cooking food in the microwave oven at a lower wattage setting. It takes longer, but still achieves its goal. Global Warming history completely coincides with the history of artificial satellites and the use of microwave radio
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