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A leitmotif or Leitmotiv [1] (/ ˌ l aɪ t m oʊ ˈ t iː f /) is a "short, recurring musical phrase" [2] associated with a particular person, place, or idea. It is closely related to the musical concepts of idée fixe or motto-theme . [ 2 ]
Joseph Ritter von Fraunhofer (/ ˈ f r aʊ n ˌ h oʊ f ər /; German: [ˈfraʊnˌhoːfɐ]; 6 March 1787 – 7 June 1826 [1]) was a German physicist and optical lens manufacturer. He made optical glass, an achromatic telescope, and objective lenses. He developed diffraction grating and also invented the spectroscope.
When tests were made with images expanded to a mere 1/8 of an inch in width, the coarseness of the silver bromide emulsion used on the cylinder became unacceptably apparent. Around June 1889, the lab began working with sensitized celluloid sheets, supplied by John Carbutt, that could be wrapped around the cylinder, providing a far superior base ...
Quizlet is a multi-national American company that provides tools for studying and learning. [1] Quizlet was founded in October 2005 by Andrew Sutherland, who at the time was a 15-year old student, [ 2 ] and released to the public in January 2007. [ 3 ]
In the history of science, Laplace's demon was a notable published articulation of causal determinism on a scientific basis by Pierre-Simon Laplace in 1814. [1] According to determinism, if someone (the demon) knows the precise location and momentum of every atom in the universe, their past and future values for any given time are entailed ...
Seth Henry Neddermeyer was born in Richmond, Michigan, on September 16, 1907. [1] He attended Olivet College, a small college that his mother, older sister, and uncle had also attended, [2] for two years before his family moved to California. He transferred to Stanford University, from which received his Bachelor of Arts (AB) degree in 1929. [1]
The conceptual differences between physics theories discussed in the 19th century and those that were most historically prominent in the first decades of the 20th century lead to a characterization of the earlier sciences as "classical physics" while the work based on quantum and relativity theories became known as "modern physics".
A theory of everything (TOE), final theory, ultimate theory, unified field theory, or master theory is a hypothetical singular, all-encompassing, coherent theoretical framework of physics that fully explains and links together all aspects of the universe. [1]: 6 Finding a theory of everything is one of the major unsolved problems in physics. [2 ...