News tagged with physical theories
Equivalence principle in space test
May 11, 2009 |
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Since Galileo Galilei and Newton, the assumption is valid that inert and heavy mass are equivalent. This is, however, questioned by new physical theories such as the String theory. Now, the equivalence principle ...
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Macro, not micro: modified theories of gravity
Feb 16, 2007 |
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When it comes to cosmology, the macro scale is important. As scientists search for the reasons behind the increasing rate at which the universe is expanding, they modify Einstein’s theory of gravity and delve into dark energy ...
Vanquishing infinity: Old methods lead to a new approach to finding a quantum theory of gravity
Aug 17, 2009 |
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Quantum mechanics and Einstein's theory of general relativity are both extremely accurate theories of how the universe works, but all attempts to combine the two into a unified theory have ended in failure. ...
DNA advances fuel racism fears
Nov 12, 2007 |
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New developments in genetics are advancing medicine, but some scientists and advocates fear they could be misinterpreted as support for racist theories.
World's smallest incandescent (nano)lamp with carbon nanotube filament
May 06, 2009 |
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(PhysOrg.com) -- In an effort to explore the boundary between thermodynamics and quantum mechanics -- two fundamental yet seemingly incompatible theories of physics -- a team from the UCLA Department of Physics ...
Scientists unlock physical, chemical secrets of plutonium
Mar 28, 2007 |
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Researchers at Rutgers, The State University of New Jersey, have unlocked some of the physical and chemical secrets of plutonium, an element known for its use in atomic weapons and power plant fuel. While the complex nuclear ...
Researcher Investigates the Basis of Einstein's First Approximation in the Theory of Relativity
Jul 15, 2009 |
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(PhysOrg.com) -- In his discussion of accelerated motion on page 60 of The Meaning of Relativity, Albert Einstein made an approximation that allowed him to develop the theory of relativity further. Einstein apparently never ...
What if dark matter particles aren't WIMPs?
Dec 12, 2008 |
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(PhysOrg.com) -- For years, many physicists have accepted that dark matter is composed of weakly interacting massive particles (WIMPs). The fact that WIMPs can naturally explain the amount of dark matter in the universe – ...
Loopy photons clarify 'spookiness' of quantum physics
Mar 18, 2008 |
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Researchers at the National Institute of Standards and Technology and the Joint Quantum Institute (NIST/University of Maryland) have developed a new method for creating pairs of entangled photons, particles of light whose ...
String Theory Gets a Boost
Jan 29, 2008 |
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Among the scientific theories that excite a great deal of controversy are those theories that deal with strings. And the idea of cosmic strings gets as much play as any in scientific circles.
A new way to test general relativity
Apr 16, 2007 |
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"Atom interferometry is an exciting field which has been awarded three Nobel prizes in the last decade," Savas Dimopoulos tells PhysOrg.com. “It is a new precision tool with a variety of applications.” Dimopoulos, a phys ...
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