4.Since the middle of this century, major progress has been made in the studies of atomic energy, space technology, microelectronics, information technology, bio-engineering and new materials, which has greatly increased the human cognitive power of nature and society.
5.German-born American theoretical physicist whose special and general theories of relativity revolutionized modern thought on the nature of space and time and formed a theoretical base for the exploitation of atomic energy. He won a1921 Nobel Prize for his explanation of the photoelectric effect.
