for the reasons of excessive content of the internet this pearltree is trying to be easily approached and science oriented. comments desired ;) Jul 24
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physic pearltrees, various
large particles - classical mechanics
practical / entertaining phycis
The two physics stories that dominated the news in 2011 were questions rather than solid scientific results, namely "Do neutrinos travel faster than light?" and "Has the Higgs boson been found?". However, there have also been some fantastic bona fide research discoveries over the last 12 months, which made it difficult to decide on the Physics World 2011 Breakthrough of the Year.
This comprehensive open-access encyclopedia, authored by Dr. Rüdiger Paschotta and provided by RP Photonics Consulting GmbH , explains the physical principles and common techniques in laser technology, while also covering major areas of fiber-optic technology and nonlinear optics, and addressing supplementary topics like ultrashort pulses, optical communications, general optics, optoelectronics, and quantum optics.
relativity and "standard model" theories
Title page, Preface and Table of Contents for Einstein for Everyone Introduction: the Questions
General relativity , or the general theory of relativity , is the geometric theory of gravitation published by Albert Einstein in 1916 [ 1 ] and the current description of gravitation in modern physics . General relativity generalises special relativity and Newton's law of universal gravitation , providing a unified description of gravity as a geometric property of space and time , or spacetime . In particular, the curvature of spacetime is directly related to the energy and momentum of whatever matter and radiation are present.
Our basic premise is that minuscule apparent violations of Lorentz and CPT invariance might be observable in nature.
A film for a wide audience! Nine chapters, two hours of maths, that take you gradually up to the fourth dimension. Mathematical vertigo guaranteed!
Matrix mechanics is a formulation of quantum mechanics created by Werner Heisenberg , Max Born , and Pascual Jordan in 1925. Matrix mechanics was the first conceptually autonomous and logically consistent formulation of quantum mechanics.
Thermodynamics Research Laboratory
Gravitational microlensing is an astronomical phenomenon due to the gravitational lens effect. It can be used to detect objects ranging from the mass of a planet to the mass of a star, regardless of the light they emit. Typically, astronomers can only detect bright objects that emit lots of light ( stars ) or large objects that block background light (clouds of gas and dust).
A refers to a distribution of matter (such as a cluster of galaxies ) between a distant source (a background galaxy ) and an observer, that is capable of bending (lensing) the light from the source, as it travels towards the observer. This effect is known as gravitational lensing and is one of the predictions of Albert Einstein 's general theory of relativity . Although Orest Chwolson is credited as being the first to discuss the effect in print in 1924, the effect is more commonly associated with Einstein , who published a more famous article on the subject in 1936.
10/05/2007 1:00 PM Broad InstituteSteven Chu, Secretary of EnergyDescription: This Nobel Prize"winning scientist admits to staying up late the night before his talk to bone up on thermodynamics. He puts his research to good use, discussing the history and application of the laws of thermodynamics, which have served as "the scientific foundation of how we harness energy, and the basis of the industrial revolution, the wealth of nations." Taking Watt's 1765 steam engine, Stephen Chu illustrates basic principles of thermodynamics -- that energy is conserved, that you can do work from heat, especially when you maximize the difference in temperature in the system and minimize heat dissipation from friction. Chu offers another form of the laws: You can't win; you can't break even; and you can't leave the game. The game hasn't changed all that much in the past few centuries. Nations now burn coal for electricity, achieving around 40% thermal efficiency.
Ever wanted X-ray specs or super-human vision?
The universe can be a very strange place.
particle quantum physics, electrons / photons, fermions / bosons
http://www.youtube.com/watch?v=v3pYRn5j7oI&list=PL2D30B1DEFFDA0310&feature=plpp_play_all for whole playlist :) by Aug 24