Absolute permittivity via relative permittivity
===============================================

Absolute permittivity of a medium can be expressed as the product of its relative permittivity
and vacuum permittivity.

**Notation:**

#. :math:`\varepsilon_0` (:code:`epsilon_0`) is :attr:`~symplyphysics.quantities.vacuum_permittivity`.

**Links:**

#. `Wikipedia <https://en.wikipedia.org/wiki/Relative_permittivity#Definition>`__.

.. py:currentmodule:: symplyphysics.laws.electricity.absolute_permittivity_via_relative_permittivity

.. py:data:: absolute_permittivity

    :attr:`~symplyphysics.symbols.electrodynamics.absolute_permittivity`.

Symbol:
    :code:`epsilon`

Latex:
    :math:`\varepsilon`

Dimension:
    :code:`capacitance/length`


.. py:data:: relative_permittivity

    :attr:`~symplyphysics.symbols.electrodynamics.relative_permittivity`.

Symbol:
    :code:`epsilon_r`

Latex:
    :math:`\varepsilon_\text{r}`

Dimension:
    :code:`dimensionless`


.. py:data:: law

    :code:`epsilon = epsilon_0 * epsilon_r`


    Latex:
        .. math::
            \varepsilon = \varepsilon_0 \varepsilon_\text{r}