2. Something on which exertion or labor is expended; a task or undertaking.
3. Productive or operative activity.
4. Employment, as in some form of industry; especially, as a means of earning one's livelihood: "He was looking for work."
2. The energy required to raise an electron with the Fermi energy (average energy of electrons in a metal) in a solid to the energy level of an inactive electron in a vacuum outside the solid.
The term Fermi energy is named after Enrico Fermi (1901-1954), an Italian nuclear physicist and refers to the level in the distribution of electron energies in a solid at which a quantum state is equally likely to be occupied or empty.
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2. The energy difference between the Fermi level and vacuum zero.
The minimum amount of energy it takes to remove an electron from a substance into the vacuum.
The term Fermi refers to a unit of length, equal to 10-15 meters; used particularly in measuring nuclear distances.