???wireLess technOLOgies???

Wireless communication... is the transfer of information over a distance without the use of electrical conductors or "wires". The distances involved may be short (a few meters as in television remote control) or long (thousands or millions of kilometers for radio communications). When the context is clear, the term is often shortened to "wireless". Wireless communication is generally considered to be a branch of telecommunications.


^^Kinds Of wireLess devices^^
Photophone
=The wOrLd's first wireLess teLephOne cOnversatiOn Occurred in 1880, when ALexander GrahambeLL and CharLes Sumner Tainter invented and patented the phOtOphOne, a telephOne that conducted audiO cOnversations wireLessLy Over mOduLated Light beams (which are narrOw prOjectiOns Of eLectrOmagnetic waves ). In that distant era when utiLities did nOt yet exist tO prOvide eLectricity, and Lasers had nOt even been cOnceived Of in science fictiOn, there were nO practical appLicatiOns for their inventiOn, which was highLy Limited by the avaiLabiLity Of bOth sunLight and goOd weather. SimiLar tO free space OpticaL cOmmunicatiOn, the phOtOphOne aLsO required a cLear Line Of sight between its transmitter and its receiver. It would be several decades before the photophone's principals found their first practical applications in military communications and later in fiber-optic communications.

Radio

The term "wireless" came into public use to refer to a radio receiver or transceiver (a dual purpose receiver and transmitter device), establishing its usage in the field of wireless telegraphy early on; now the term is used to describe modern wireless connections such as in cellular networks and wireless broadband Internet. It is also used in a general sense to refer to any type of operation that is implemented without the use of wires, such as "wireless remote control" or "wireless energy transfer", regardless of the specific technology (e.g. radio, infrared, ultrasonic) that is used to accomplish the operation. While Guglielmo Marconi and Karl Ferdinand Braun were awarded the 1909 Nobel Prize for Physics for their contribution to wireless telegraphy, it has only been of recent years that Nikola Tesla has been formally recognized as the true father and inventor of radio.

Television remote control

Modern televisions use wireless (generally infrared) remote control units. Now radio waves are also used.

Cellular telephony (phones and modems)

Perhaps the best known example of wireless technology is the cellular telephone and modems. These instruments use radio waves to enable the operator to make phone calls from many locations worldwide. They can be used anywhere that there is a cellular telephone site to house the equipment that is required to transmit and receive the signal that is used to transfer both voice and data to and from these instruments.

WiFi

Wi-Fi is a wireless LAN technology that enables laptop PCs, PDAs, and other devices to connect easily to the internet. Technically known as IEEE 802.11 a,b,g,n, Wi-Fi is less expensive and nearing the speeds of standard Ethernet and other common wire-based LAN technologies. Several Wi-Fi hot spots have been popular over the past few years. Some businesses charge customers a monthly fee for service, while others have begun offering it for free in an effort to increase the sales of their goods.

...my favOrite wireLess device?????

...maybe it wouLd be my ipOd...................................can't Live withOut muzzic.... :)


...a wOrLd withOut wireLess devices??????
..guess it wOuLd be hard fOr peOpLe tO cOmmunicate and enjOy Life withOut it........ it wOuLd be such a bOOOring wOrLd fOr peOpLe tO Live in........ :)