How do iPhones work?


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As we know today, the iPhone has become one of the hottest selling cell phones on the market? With such high technology, we look back and ask, how does any cell phone work? Although some, like the iPhone, are more advanced, each cell phone works the same around a certain system in order to communicate wirelessly. The system in a cell phone is divided in service cell areas, the key part of function. These cells then contain a base station in the center providing coverage over a 2-3 mile zone. After the transmission to these towers, then that connection reaches the stationary land based telephone system, which allows you to actually make a phone call! Through all of these transmission, frequencies are evident from the power of your phone (similar to waves and magnetism :]).

MAIN FUNCTION
These towers are communicating by the traveling of electromagnetic waves. You can find these waves in a system with transmitters. These waves travel through space from reflections or direct paths. From this travel, a noise is created for the desired signal. These waves that produce noise from such high pressure intensity is then intercepted by antennas (connection accessors). The energy that is captured from this intercepted is then reformed into " oscillating electric currents" (Wikipedia). Detectors find these currents, which ultimately reach the responder in order to hear the invented noise from the other electronic device. A very complicated process.

A program called "The Physics of Cell Phones and Wireless Communications program " allowed students to explore this question I've researched. What this program taught them was the basic fundamentals behind this complex process above with the cell system and frequencies. What they did was identify waves for vibrations of phones, sound, light, electricity and magnetism to answer this question. Learning the basics has brought them to be able to understand waves are being transmitted through frequencies to hear one another on the phone. Also, they learned how to decode and code digital signals in relation to magnetism. Through waves, frequencies, and base systems, magnetism is very evident in the physics behind any cell phone, like the iPhone, to work.

In specifics towards the iPhone, one thing that's different is it's a touch screen. Many ask as well, how do touch screens work? The key is there are 2 separate screens: one a screen and one a keyboard. Each screen then has a specified hardware to even out the differences. For these screens to combine and work by one touch, a magnetic bar is inserted throughout the phone. What this does is it connects the screens with comfortability per touch. The type of "charge" people believe are coming off from the touch is really just waves circulating that moment of action, poles frequently circulating to balance out (like our demo lab!). These waves make part of a surface acoustic wave system with an x and y axes along the monitor (like a hidden graph, maybe like a compass :]).
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Video
How Cell Phones work



Simulation
Electromagnetic Waves



Sources:
http://www.wired.com/gadgetlab/2008/09/fujitsu-and-doc/

http://www.yale.edu/ynhti/curriculum/units/2003/4/03.04.07.x.html

http://www.nsta.org/publications/news/story.aspx?id=52874

http://computer.howstuffworks.com/question716.htm


http://en.wikipedia.org/wiki/Radio