It was the American inventor Edison who really invented the electric light to make it shine. Edison is an extremely diligent man. He likes to do all kinds of experiments and make many exquisite machines. He is particularly interested in electrical appliances. Ever since Faraday invented the electric motor, Edison was determined to make electric lights and bring light to mankind.
1879, Edison also began to study electric lights. He believes that the key to prolong the life of incandescent lamps is to improve the vacuum degree of bulbs and use heat-resistant materials with low power consumption, strong luminescence and low price as filaments. Edison tried 1600 kinds of heat-resistant materials successively, and the results were not satisfactory.
1879 65438+1October 2 1, he used carbonized cotton thread as a filament, put it in a glass ball, and then started the air compressor to vacuum the ball. Results The light emitted by carbonized cotton thread was bright and stable, lasting for more than 10 hour. In this way, the carbonized cotton filament incandescent lamp was born, and Edison obtained a patent for it.
Evaluation of Edison:
Edison is one of the famous geniuses in the history of technology, and holds 1093 invention patents for incandescent lamp, phonograph, film projector and camera. Among them, Edison's four great inventions: the phonograph, the electric light, the electric power system and the talking film have enriched and improved the civilized life of mankind. ?
Miller said in Edison's Biography: "Without God's revelation, without the helmsman and guiding power, Edison would never have the precise mind of science and mathematics to understand the mysteries of the universe. Celestial planets keep rotating in a certain orbit for thousands of years; The wonder of creation, the diversity of life, the magic and inconceivability of animals, plants and minerals all make him believe that there must be mysteries in the universe. " ?
Lodge, president of the Royal Society, called him "the greatest man in the world".