Photo taken on Oct. 7, 2014 shows portraits of three scientists who share the 2014 Nobel Prize in Physics, at the Royal Swedish Academy of Sciences in Stockholm, capital of Sweden. Isamu Akasaki and Hiroshi Amano of Japan and Japanese-born U.S. scientist Shuji Nakamura won the 2014 Nobel Prize in Physics for their invention of blue light-emitting diodes, a new energy efficient and environmentally friendly light source, the award-giving body announced Tuesday. (Xinhua/Shi Tiansheng) |