The future is here !!!!!!
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Transcript of The future is here !!!!!!
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:[
:
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 ?