Energy level
hideA quantum mechanical system or particle that is bound, confined spatially, can only take on certain discrete values of energy, as opposed to classical particles, which can have any energy. These values are called energy levels. The term is most commonly used for the energy levels of electrons in atoms or molecules, which are bound by the electric field of the nucleus. The energy spectrum of a system with energy levels is said to be quantized.
If the potential energy is set to zero at infinity, the usual convention, then bound electron states have negative potential energy.
Energy levels are said to be degenerate, if the same energy level is obtained by more than one quantum mechanical state. They are then called degenerate energy levels.
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News tagged with energy state
The hidden lives of proteins
Dec 02, 2009 |
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An important Brandeis study appearing in the December 3 issue of Nature raises the curtain on the hidden lives of proteins at the atomic level. The study reports that for the first time, researchers used x ...
Magnetic Cactus Experimentally Demonstrates Mathematical Plant Patterns
May 20, 2009 |
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(PhysOrg.com) -- One of humanity’s earliest mathematical inquiries might have involved the geometric patterns in plants. The arrangement of leaves on a branch, seeds in a sunflower, and spines on a cactus ...
Quantum doughnuts slow and freeze light at will: 'fast computing & slow glass'
Mar 09, 2009 |
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(PhysOrg.com) -- Research led by the University of Warwick has found a way to use doughnuts shaped by-products of quantum dots to slow and even freeze light, opening up a wide range of possibilities from reliable and effective ...
Stable Thanks to Dynamics - DNA Component Resists UV Radiation
Feb 23, 2009 |
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(PhysOrg.com) -- Complex computer simulations have, for the first time, allowed scientists to examine in detail the processes that help to ensure the stability of DNA when exposed to UV light. The findings, ...
New solar energy material captures every color of the rainbow
Oct 16, 2008 |
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Researchers have created a new material that overcomes two of the major obstacles to solar power: it absorbs all the energy contained in sunlight, and generates electrons in a way that makes them easier to capture.
