The value of Epsilon Naught is used to calculate a material’s dielectric constant. I hope you now understand the Epsilon nought, as well as the Epsilon naught unit in SI and CGS units, as well as the relevance and applications of the Epsilon naught in numerous areas of physics. What is a permittivity? In every location in the cosmos, the Epsilon Naught value remains constant. Vacuum permittivity is represented by ε0, which is pronounced as either Epsilon Naught or Epsilon Zero. Epsilon Naught (& epsilon ;0) is the permittivity of free space or electric constant, not to be confused with Epsilon not (& epsilon ;). Learn its value , units and significance in physics with examples and quiz. Get to know about the basic concepts of Epsilon Naught Value or Permittivity of Free Space. Click on the link to get more information!