Explore: Energy Levels

or vibrational or rotational energy levels in molecules. The energy spectrum of a system with such discrete energy levels is said to be quantized. In chemistry

In quantum mechanics, an energy level is degenerate if it corresponds to two or more different measurable states of a quantum system. Conversely, two or

state physics to analyze the energy levels in a solid, the Fermi level can be considered to be a hypothetical energy level of an electron, such that at

the terms as energy levels of the atom divided by the Planck constant, leading to the modern view that the spectral lines result from energy differences

von Fraunhofer and William Hyde Wollaston. The notion of quantized energy levels was proposed in 1913 by Danish physicist Niels Bohr in the Bohr theory

of a solid describes the range of energy levels that electrons may have within it, as well as the ranges of energy that they may not have (called band

electron orbitals across closely packed energy levels—the local density of the electronic states near the Fermi level. Because of the distances involved,

the spin–orbit interaction leading to shifts in an electron's atomic energy levels, due to electromagnetic interaction between the electron's magnetic

using the below description of the rotational energy levels. While the study of vibrational energy level of the diatomic molecules can be described using

change in eigenvalues; several distinct energy levels emerge in place of the former degenerate (multi-state) level. This may occur because of external fields