Thomas Alva Edison, 1
Inventor of electric light. ThomasAlvaEdison (1847, February11-1931,10, 10/8) was born in. Inventors and entrepreneurs. Edison was the first person in human history to use a large number of production principles and electrical engineering research laboratories to patent inventions, which had a great and far-reaching impact on the world. His invention of the phonograph, movie camera and electric light had a great influence on the world.
2. Marvin Kamras
Inventor of tape recorder. Marvin Kamras, an American radio enthusiast, played a key role in popularizing tape recorders. When studying the problem of recording signal damage, he came up with the view that the surface magnetism of steel wire is always the same. If the sound can be recorded evenly on the surface of the steel wire, a uniform sound signal can be obtained.
3. john von neumann
The inventor of the electronic computer. Johanvonneumann (1903 ~1957), originally from Hungary, holds a doctorate in mathematics from Budapest University. One of the most important mathematicians in the 20th century, and one of the scientific generalists in the fields of modern computer, game theory, nuclear weapons, biochemical weapons, etc., was called "the father of computer" and "the father of game theory" by later generations. ?
4. Robert Jeffrey Edwards
Inventor of IVF. Edwards worked in Cambridge University from 1963. Together with Patrick steptoe (who died in 1988), he developed in vitro artificial insemination technology (commonly known as IVF technology), and the world's first IVF was born in 1978. Subsequently, they jointly established the world's first in vitro fertilization research center-Bernhard Reproductive Medicine Center.
5. stephen william hawking
Stephen Williamhawking (194265438+1October 8 to 2065438+March 08) mainly studied cosmology and black holes, proved the singularity theorem of general relativity and the black hole area theorem, put forward the black hole evaporation theory and the borderless Hawking universe model, and unified the two basic theories of physics in the 20th century.
All the above scientists have made great contributions to all fields of society, and there is no standard to define who must be the greatest. In terms of influence, Hawking's influence is relatively large.
Extended data:
Scientist: a person who objectively and digitally reproduces, understands, explores and practices the unity of real nature and unknown life, environment, phenomena and related phenomena, such as Einstein and Hawking.
Experts traditionally regarded as scientists include mathematicians, physicists, astronomers, cosmologists, chemists, biologists, physiologists, zoologists, botanists, geographers, ecologists, neuroscientists, computer scientists, aviation scientists, geneticists, virologists, arborists, entomologists, geologists, reptiles, hydraulics and ichthyology.
References:
Baidu Encyclopedia-Scientific Achievements in the 20th Century