An American and two Japanese scientists won the 2014 Nobel Prize for Physics on Tuesday for inventing a new energy-efficient and environment-friendly light source, leading to the creation of modern LED light bulbs. Isamu Akasaki and Hiroshi Amano of Japan and Japanese-born U.S. citizen Shuji Nakamura won the prize for developing the blue light-emitting diode -- the missing piece that now allows manufacturers to produce white-light lamps.
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