# Permittivity of free space

Permittivity of free space is a measure of the ability of a vacuum to permit the passage of an electric field. It is a fundamental constant of electromagnetism that appears in the Maxwell equations. The permittivity of free space is also known as the electric constant, the dielectric constant of vacuum, or simply as the vacuum permittivity.

In SI units, the permittivity of free space is given by:

varepsilon_0 = frac{1}{mu_0 c^2}

where μ0 is the permeability of free space and c is the speed of light in vacuum.

The permittivity of free space has the value:

varepsilon_0 = 8.85418782 times 10^{-12} mathrm{frac{F}{m}}

in SI units.

The concept of permittivity is useful for understanding the behavior of dielectric materials, which are materials that can be polarized by an electric field. When an electric field is applied to a dielectric material, the material's molecules align themselves with the field, resulting in a net dipole moment within the material. The permittivity of the material is a measure of how easily the molecules can be polarized, and is therefore a measure of the material's ability to store electrical energy.

#### What is permittivity and permeability of free space?

Permittivity is a measure of how an electric field affects and is affected by a dielectric material. The higher the permittivity of a material, the more it is affected by an electric field.

Permeability is a measure of how a magnetic field affects and is affected by a material. The higher the permeability of a material, the more it is affected by a magnetic field.

The permittivity of free space is the permittivity of a vacuum. It is a measure of how an electric field affects and is affected by the vacuum. The permeability of free space is the permeability of a vacuum. It is a measure of how a magnetic field affects and is affected by the vacuum. How is permittivity of free space measured? The permittivity of free space is typically measured in Farads/meter (F/m), which is the SI unit for permittivity. The value of the permittivity of free space is 8.854 x 10-12 F/m.

##### What is ε0 in physics?

The Greek letter ε (epsilon) is used in physics to represent the dielectric constant, which is a measure of the amount of electric field that a material can store. The dielectric constant is also known as the permittivity.

The value of ε0 (epsilon naught or epsilon zero) is the permittivity of vacuum. It is a physical constant that is equal to 8.854187817×10−12 Farad/meter. What is unit of permittivity? The unit of permittivity is the farad per meter (F/m), which is the standard unit in the International System of Units (SI). The farad is the SI unit of capacitance, and the meter is the SI unit of length. What is called permittivity? Permittivity, also called dielectric constant, is a measure of how easily a material can be polarized by an electric field. The higher the permittivity of a material, the more it can be polarized in the presence of an electric field.