History of the transistor about 15 volts". Brattain and H. R. Moore made a demonstration to several of their colleagues and managers at Bell Labs on the afternoon of 23 December 1947, often given as the birth date of the transistor. The "PNP point-contact germanium transistor" operated as a speech amplifier with a power gain of 18 in that trial. In 1956 John Bardeen, Walter Houser Brattain, and William Bradford Shockley were honored with the Nobel Prize in Physics "for their researches on semiconductors and their discovery of the transistor effect". Twelve people are mentioned as directly involved in the invention of the transistor
Nobel Prize controversies research CERN, commented in a scientific meet in Kolkata titled "Frontiers of Science" that "it is unfortunate that pioneering Indian physicist Satyendra Nath Bose did not win the Nobel Prize for work on quantum physics in the 1920s that provided the foundation of the Bose–Einstein statistics and the theory of the Bose–Einstein condensate". Albert Einstein's 1921 Nobel Prize Award mainly recognized his 1905 discovery of the mechanism of the photoelectric effect and "for his services to Theoretical Physics". The Nobel committee passed on several nominations for his many other seminal contributions, although these led to prizes for others who later