Daily Current Affirs

English GK

Archive

Kilicheppu

Words to PSC

Previous QP PDF

Tuesday, 7 October 2014

Nobel Prize 2014 - Physics

Nobel Prize  2014 | Nobel Prize in Medicine 2014 | Nobel Prize in Physics 2014 | Nobel Prize in Chemistry 2014 | Nobel Prize  in Literature 2014 | Nobel Prize in Physiology 2014 | Nobel Prize in Economics 2014 | Nobel Prize in Peace 2014
-----------------
Nobel Prize for Physics 2014 for the invention of efficient blue light-emitting diodes which has enabled bright and energy-saving white light sources”
Isamu Akasaki , Hiroshi Amano and Shuji Nakamura

When Isamu Akasaki , Hiroshi Amano and Shuji Nakamura produced bright blue light beams from their semi- conductors in the early 1990s, they triggered a funda- mental transformation of lighting technology. Red and green diodes had been around for a long time but without blue light, white lamps could not be created. Despite considerable efforts, both in the scientific community and in industry, the blue LED had remai - ned a challenge for three decades
They succeeded where everyone else had failed. Aka - saki worked together with Amano at the University of Nagoya, while Nakamura was employed at Nichia Che - micals, a small company in Tokushima. Their inven - tions were revolutionary. Incandescent light bulbs lit the 20th century; the 21st century will be lit by LED lamps.
White LED lamps emit a bright white light, are long-lasting and energy-efficient. They are constantly improved, getting more efficient with higher lumi - nous flux (measured in lumen) per unit electrical input power (measured in watt). The most recent record is just over 300 lm/W, which can be compared to 16 for regular light bulbs and close to 70 for fluores - cent lamps. As about one fourth of world electricity consumption is used for lighting purposes, the LEDs contribute to saving the Earth’s resources. Materials consumption is also diminished as LEDs last up to 100,000 hours, compared to 1,000 for incandescent bulbs and 10,000 hours for fluorescent lights.

The LED lamp holds great promise for increasing the quality of life for over 1.5 billion people around the world who lack access to electricity grids: due to low power requirements it can be powered by cheap local solar power
The invention of the blue LED is just twenty years old, but it has already contributed to create white light in an entirely new manner to the benefit of us all.
Isamu Akasaki , Japanese citizen. Born 1929 in Chiran, Japan. Ph.D. 1964 from Nagoya University, Japan. Professor at Meijo University, Nagoya, and Distinguished Professor at Nagoya University, Japan. 
Read More :- http://en.nagoya-u.ac.jp/people/distinguished_award_recipients/nagoya_university_distinguished_professor_isamu_akasaki.html  

Hiroshi Amano , Japanese citizen. Born 1960 in Hamamatsu, Japan. Ph.D. 1989 from Nagoya University, Japan. Professor at Nagoya University, Japan. 
Read More :- http://profs.provost.nagoya-u.ac.jp/view/html/100001778_en.html 


Shuji Nakamura , American citizen. Born 1954 in Ikata, Japan. Ph.D. 1994 from University of Tokushima, Japan. Professor at University of California, Santa Barbara, CA, USA  
Read More :- www.sslec.ucsb.edu/nakamura/
Read More About This  Nobel Prize
1. http://www.nobelprize.org/nobel_prizes/physics/laureates/2014/advanced-physicsprize2014.pdf
2. http://www.nobelprize.org/nobel_prizes/physics/laureates/2014/popular-physicsprize2014.pdf
--------------------------------

Attention Please :- Dear Readers do U have any PSC Previous Question Papers with You ? If Yes Just e-mail Me - keralaapschelper@gmail.com OR krishnakripamail@gmail.com

No comments:

Post a Comment

Advertise Here
Advertise Here