2eVh

2eVh is not a standard unit or widely recognized constant in physics. Its meaning depends on the context in which it appears, and it can be encountered as a shorthand, a label in a dataset, or as a nonstandard product of other quantities. Because it is not unambiguously defined, readers should rely on surrounding text to interpret its intended meaning.

One possible interpretation is that 2eVh represents the product of an energy scale of 2 electronvolts (2 eV) and Planck's constant h. In this reading, the quantity would have unconventional units (eV·J·s) and is not a conventional physical observable; in practice, physicists typically convert to standard forms such as E = hν or express energy in eV and frequency in hertz directly. If E = 2 eV, the corresponding frequency is ν = E/h ≈ 2 eV / (4.1357×10^-15 eV·s) ≈ 4.8×10^14 Hz, placing the photon in the visible range around 620 nanometers.

In other contexts, 2eVh might appear as a label or shorthand in notes or datasets, indicating a two-electron-volt energy scale, a hole state, or simply a typographical abbreviation. In such cases, it is essential to consult the source or accompanying definitions to determine the intended meaning.

When encountering ambiguous notation like 2eVh, standard practice is to convert energies to conventional units and, if possible, rewrite expressions using h, ħ, or ν in familiar forms to avoid misinterpretation.

See also: Planck constant, electronvolt, photon energy, frequency–energy relation.