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The role of physics in INFORMATION TECHNOLOGY (IT)

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Shandana Ahmed

on 4 November 2013

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Transcript of The role of physics in INFORMATION TECHNOLOGY (IT)

The role of physics in Information technology(I.T)
The transistor is the building block of all modern electronics and computers (everything from a battery operated watch, to a coffee maker, to a cell phone, to a supercomputer). Microprocessors for modern personal computers, such as the Intel Pentium 4 Processor, contain around 55 million transistors each. Unless you printed this page and are reading it in the woods, there are millions of transistors within a meter of you at this time (and even in the woods you probably have a cell phone and are wearing a watch)
The underlying theory of photons which made the invention of the laser possible was first developed by Albert Einstein in 1905,CD players, CD-ROMs, CD-burners, and DVD players all use lasers to read data. Without fundamental research in physics by Einstein, the inventors of the laser, and others, the CD and other applications of the laser such as fiber optics representing industries worth billions of dollars would not exist. It is ironic that, like so many other discoveries in physics, the laser was at first thought by many to have no practical uses whatsoever.
it's amazing to know that physics plays an importanat role in the field of I.T !!!!
Nearly everyone would agree that the computer, the transistor, and the World Wide Web are among the greatest inventions of the 20th century. Economists and laymen alike know that today's entire world economy is inextricably linked to these technologies. The daily lives of a large fraction of Earth's inhabitants would be substantially different were it not for their inventions.. These inventions make up the foundation of modern technology.
let us first study about information
Information technology is the use of electronic computers and computer software to convert, store, protect, process, transmit, and securely retrieve information.
Physics is both significant and influential, in part because advances in its understanding have often translated into new technologies, but also because new ideas in physics often resonate with the other sciences, mathematics and philosophy.
Importance of physics in I.T
Solid state physics is responsible for semiconductors, which are responsible for semiconducting diodes and transistors, which are in turn at the heart of every memory chip and processor in every computer in the world.
for instance:

it is an extremely useful instrument.the function of a television and some other electronic machines can be controlled by it from a large distance without any cable connection.infra red radiations are used to operate it.when any button placed at it's panel is pressed,the bulb in control circuit generates a particular binary code signal.this signal emits,from a light emitting diode called LED,an infra red radiation of the same particular code.
when these radiations fall on a lens fitted in a television or any other electric machine,then a photo transistor attached with the lens identifies and sends them to a circuit which decodes the binary signals and issues the order accordingly.thus we can control the function of the television or other appliances from a far off distance by a remote control system.
There are many devices which are based on the principles of physics,
some of them are :
Remote Control System
The floppy disk drive (FDD) was the primary means of adding data to a computer until the CD-ROM drive became popular. In fact, FDDs have been a key component of most personal computers for more than 20 years.Basically, a floppy disk drive reads and writes data to a small, circular piece of metal-coated plastic similar to audio cassette tape.
Floppy disk is made of flexible plastic which is coated with ferromagnetic compound.The disc is housed in a projective jacket having several holes cut in it.
Floppy Disc
Audio-video tapes,compact discs,laser discs,floppy discs and hard discs are in use for storing information.These devices can store a huge amount of information in a very small space.We can benefit from any of the devices as we require.Usually storage devices work on the principle of magnetism where as laser technology is used in CD's.
Information Storing Devices
TV tubes displays the picture part of the audio video signal on TV screen whereas sound is received through the speakers.Instead of broadcasting, Specific instruments fitted in the TV set separate the sound and picture signals, which are strengthened by the amplifier.
EM waves are sent to a TV set via special wire called 'cable'. High quality picture and sound is received with the help of a cable.
*Physics had the answers when it came to designing the chips computers are made of.
*Physics made communication on wire and fiber optics possible.
* The design of memory circuits and methods used physics.
* LASERs are definitely a physics triumph that make a lot of what computers do happen.
let us have some in short !!!!
It is understood and well known that physics plays an important role in the field of "INFORMATION TECHNOLOGY (IT)" ,And nearly every device has some physics principles!!!
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