Energy price hikes hit older people hardest, study finds

Adults ages 60 and up in developed nations are spending more money on energy than younger counterparts—and are also more likely to struggle to reduce those higher costs, according to research led in part by University of ...

Radio waves can tune up bacteria to become life-saving medicines

Scientists from Australia and the United States have found a new way to alter the DNA of bacterial cells—a process used to make many vital medicines including insulin—much more efficiently than standard industry techniques.

page 1 from 40

Energy level

A 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.

This text uses material from Wikipedia, licensed under CC BY-SA