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Franck-Hertz experiment with Neon resulting in glowing regions appearing. In instructional laboratories, the Franck–Hertz experiment is often done using neon gas, which shows the onset of inelastic collisions with a visible orange glow in the vacuum tube, and which also is non-toxic, should the tube be broken. With mercury tubes, the model ...
Niels Henrik David Bohr (7 October 1885 – 18 November 1962) was a Danish theoretical physicist who made foundational contributions to understanding atomic structure and quantum theory, for which he received the Nobel Prize in Physics in 1922. Bohr was also a philosopher and a promoter of scientific research.
Such experiments demonstrate that particles do not form the interference pattern if one detects which slit they pass through. [71]: 73–76 According to Bohr's complementarity principle, light is neither a wave nor a stream of particles. A particular experiment can demonstrate particle behavior (passing through a definite slit) or wave behavior ...
Edison in 1861. Thomas Edison was born in 1847 in Milan, Ohio, but grew up in Port Huron, Michigan, after the family moved there in 1854. [8] He was the seventh and last child of Samuel Ogden Edison Jr. (1804–1896, born in Marshalltown, Nova Scotia) and Nancy Matthews Elliott (1810–1871, born in Chenango County, New York).
Lamb–Retherford experiment discovered Lamb shift (1947), which led to the development of quantum electrodynamics. Clyde L. Cowan and Frederick Reines confirm the existence of the neutrino in the neutrino experiment. (1955) Claus Jönsson's double-slit experiment with electrons. (1961) The quantum Hall effect, discovered in 1980 by Klaus von ...
The Bothe–Geiger experiment and the Compton–Simon experiment marked an end to the BKS theory. [8] Kramers was skeptic at the beginning. In a letter to Bohr, Kramers said "I can unfortunately not survey how convincing the experiments of Bothe and Geiger actually are for the case of the Compton effect". [5]
led to new experiments testing SR, like Stokes’s model of complete aether drag, were disproved or questioned, e.g. by the experiments of Oliver Lodge. For a more detailed timeline of aether theories – e.g. their emergence with the wave theory of light – see a separate article. Also, not all experiments are listed here – repetitions ...
The lamps on exhibition were incandescent light bulbs with carbon-filaments of high resistance, made of fibres of reed. [5] Two patents were granted to Heinrich Göbel in 1882: an improvement of the Geissler system of vacuum pumps, and a solution to connect carbon-filaments and metal-wires in a light bulb. [6] [7]