New York Times: Three physicists have been awarded the Nobel Prize for revolutionizing the way the world is lighted. The 2014 physics award went to Isamu Akasaki and Hiroshi Amano of Japan and Shuji Nakamura of the University of California, Santa Barbara, for the invention of efficient blue light-emitting diodes, which has enabled bright and energy-saving white light sources. The three scientists, working together and separately, found a way to produce blue light beams from semiconductors in the early 1990s....