It is named in honour of the French mathematician, philosopher and physicist Blaise Pascal. Galilei wrote about Castelli's technique to the German Jesuit priest, physicist, and astronomer Christoph Scheiner. His grandfather was an engineer, his father a Ph.D. physicist. Most prominent was perhaps the German quantum physicist Werner Heisenberg. Majid Shahriari, a quantum physicist was killed. It was introduced by theoretical physicist Paul Dirac. Ufimtsev was extending theoretical work published by the German physicist Arnold Sommerfeld. Penrose is the uncle of the physicist and polymath Sir Roger Penrose. Feynman was not the only frustrated theoretical physicist in the early post-war years. The Pantelegraph was invented by the Italian physicist Giovanni Caselli. The modern cleanroom was invented by American physicist Willis Whitfield. It is named after Danish physicist Niels Bohr. He is also a distant relative of Barrhead-born nuclear physicist Joseph Capaldi. Fermi is named after Italian physicist Enrico Fermi. Discovered in 1953 by American physicist Curtis J. Humphreys.