1. Harnessing light: possibilities & challenges
NATIONAL SCIENCE SEMINAR- 2015
Harnessing light: possibilities & challenges
Presented by :
Ashish Dwivedi
10th ‘A’
Guided by :
Dr. Yogendra Kothari
Govt. School For Excellence

2. .

3. NEW TECHNOLOGIES OF HARNESSING LIGHT
USING OF LASER IN DEFENCE.
Solar concentrator
HARMLESS INFRARED LIGHT SHOWS VEINS IN OUR BODY
A LATEST TECHNOLOGY
USED IN DATA TRANSMISSION.
USING OF LASER IN THE SURGERY OF GUMS OF THE MOUTH

4. SOLAR CHARGER
INVISIBILITY COAT
WATER PURIFICATION THROUGH
ULTRAVIOLET RADIATION (UV).
LIGHT PEAK
(OPTICAL CABLE COMMUNICATION)
SOLAR CAR

5. HARNESSING LIGHT

7. THIS IS AMAZIING AND UNBELIEVA
-BLE PROJECTOR THAT
CONVERTS FLAT
SURFACE
INTO A 10 INCHES
TOUCH SCREEN BY
HOLOGRAPHIC LASER PROJECTION.
HARNESSING LIGHT BY PLANTS IN THE PROCESS OF PHOTOSYNTHESIS.
UTILIZATION OF LIGHT FOR GENERATING THE ELECTRICITY.
WIND ENERGY
TIDAL ENERGY

8. SOURCES OF LIGHT “ THE SUN WHICH GIVES US MAXIMUM AMOUNT OF LIGHT.”
FLUORESCENE
“ A SUBSTANCE EMMITTING LIGHT”
LED’S

9. ARTIFICIAL SOURCE S OF LIGHT WHICH IS USED IN OUR DAILY LIFE.
RADIUM IS AN ELEMENT WHICH EMITS LIGHT
LASER TECHNIQUE USED IN MEDICAL SCIENCE MAINLY IN SURGERIES

10. CHALLANGES OF LIGHT
DUE TO THE DEPLETION OF OZONE LAYER SOME HARMFUL RAYS FROM SUN SUCH AS ULTRAVIOLET RAYS IS DIRECT CONTACTING THE LIVING ORGANISM ON EARTH WHICH IS RESPONSIBLE FOR SKINCANCER & MANY HARMFUL DISEASES .
WE MAINLY USE TUBELIGHT ELECTRIC BULBS ETC. WHICH CONSUMPS MORE ELECTRICITY THAN LED’S.
THE WORLD IS NOT USING THE SOLAR OR PHOTOVOLTIC CELL AT BIGGER LEVEL
FOR GENERATING ELECTRICITY.
THESE DAYS ELECTRICITY IS ALSO PRODUCED BY COAL . AND FROM ITS CONSUMPTION THE AMOUNT OF CARBON IS INCREASING .

11. SUGGESTIONS
WE SHOULD USE LED’S RATHER THAN ELECTRIC BULBS OR TUBELIGHT BECAUSE IT’S THE FACT THAT “WITH 20% OF THE WORLD’S ELECTRICITY USED FOR LIGHTING IT’S BEEN CALCULATED THAT OPTIMAL USE OF LED LIGHTING REDUCE THIS TO 4%” .
MAKE THE IMPROVEMENT IN THE USE OF PHOTOVOLTIC CELLS OR SOLAR CELLS THAT PERMITS SOLAR ENERGY TO PROVIDE UP TO HALF OF WORLD ENERGY WHICH WILL LEAD TO LOW CARBON FUTURE.