what measurement is eV
In physics, the electronvolt (symbol eV; also written electron volt) is a unit of energy equal to approximately 160 zeptojoules (symbol zJ) or 6981160000000000000â 1.6Ã10â19 joules (symbol J).hen, dividing the units of energy (such as eV) by a fundamental constant that has units of velocity (L T â1), facilitates the required conversion of using energy units to describe momentum. In the field of high-energy particle physics, the fundamental velocity unit is the speed of light in vacuum c.