THE FUTURE IS HERE !!!!!!

LI FITECHNOLOGY

SUBMITTED BY:

AKANKSHA SHARMA

LIGHT FIDELITY Li-fi means “LIGHT FIDELITY”.

LI-FI is transmission of data through illumination,i.e sending data through a LED light bulb that varies in intensity faster than human eye can follow

It is fast and cheap optical version of wi fi,based on visible light communication(VLC).

WHOSE IDEA?This technology was invented by

German Physicist “HARALD HASS”, from the university of Edinburgh, U.K.

He demonstrated it in theYear 2012UNIVERSITY OF EDINBURGH:[

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PRINCIPLES OF LI FI

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HOW LI FI WORKS?

LED on

1 0 1 0 1

LED off

TM

Li fi environment

need of li fi

Electromagnetic spectrum

WHY VLC ?

Issues regarding radio waves

capacity availability

efficiency security

LI FI WI FI

Difference b/w li fi and w i fi

10 Gbps 150 Mbps

Speed

LI FI WI FILIGHT RADIOWAVES

Diffrence b/w li fi and wi fi

Medium for data

transmission

LI FI WI FI10,000 times

greater spectrum

Less spectrum

range

Diffrence b/w li fi and wi fi

capacity

LI FI WI FIUses

power efficiently

Radio base stations

require lot of energy

Diffrence b/w li fi and wi fi

Efficiency

LI FI WI FILed s should be available

Radiowaves have

certain limitations

Diffrence b/w li fi and wi fi

availability

LI FI WI FIHigh

er Less

Diffrence b/w li fi and wi fi

SECURITY

Five points need to know about Li-Fi

IT DOES NOT NEED TO BE LINE OF SIGHT TO WORK.

THERE IS NO VISIBLE FLICKER.

LI FI USES POWER EFFICIENTLY.

SUNLIGHT CAUSES NO INTERFERENCE.

LIGHTS CAN BE DIMMED AND STILL TRANSMIT.

ADVANTAGES

CAPACITY EFFICIENCY

AVAILABILITY

SECURITY

APPLICATION AREASLi Fi technology is still in its infancy .However some areas where it seems perfectly applicable are:- STREET LIGHTS

TRANSPORT SYSTEM

AIRCRAFT

HOSPITALS

OCEAN BEDS/ UNDER WATER

POWER PLANTS

FUTURE OF LI FI ?