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The first paper explained the photoelectric effect, which established the energy of the light quanta =, and was the only specific discovery mentioned in the citation awarding Einstein the 1921 Nobel Prize in Physics. [3] The second paper explained Brownian motion, which established the Einstein relation = and compelled physicists to accept the ...
In physics, the observer effect is the disturbance of an observed system by the act of observation. [1] [2] This is often the result of utilising instruments that, by necessity, alter the state of what they measure in some manner. A common example is checking the pressure in an automobile tire, which causes some of the air to escape, thereby ...
Chien-Shiung Wu, after whom the Wu experiment is named, designed the experiment and led the team that carried out the test of the conservation of parity in 1956.. The Wu experiment was a particle and nuclear physics experiment conducted in 1956 by the Chinese American physicist Chien-Shiung Wu in collaboration with the Low Temperature Group of the US National Bureau of Standards. [1]
The Chemistry, Biology, Physics and Design Technology was last updated for first teaching in September 2014, with syllabus updates (including a decrease in the number of options), a new internal assessment component similar to that of the Group 5 (mathematics) explorations, and "a new concept-based approach" dubbed "the nature of science". A ...
The emergence of the muons is caused by the collision of cosmic rays with the upper atmosphere, after which the muons reach Earth. The probability that muons can reach the Earth depends on their half-life, which itself is modified by the relativistic corrections of two quantities: a) the mean lifetime of muons and b) the length between the upper and lower atmosphere (at Earth's surface).
A. Lambrecht, The Casimir effect: a force from nothing, Physics World, September 2002. NASA Astronomy Picture of the Day: Casimir effect (17 December 2006) Simpson, W. M. R; Leonhardt, U. (2015). Forces of the Quantum Vacuum: An introduction to Casimir physics. World Scientific. ISBN 978-981-4632-90-4.
The following is a list of notable unsolved problems grouped into broad areas of physics. [1]Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result.
After completing a set of five prerequisite courses, students must take additional courses in quantum mechanics, thermodynamics, experimental physics, and complex analysis. [5] Physics concentrators are required to complete a junior paper as a preliminary investigation into a senior thesis topic.