Wave speed from medium
======================

Speed of electromagnetic wave propagation depends on the refractive index of the medium.

**Notation:**

#. :math:`c` (:code:`c`) is :attr:`~symplyphysics.quantities.speed_of_light`.

**Links:**

#. `Wikipedia <https://en.wikipedia.org/wiki/Phase_velocity#Refractive_index>`__.

.. py:currentmodule:: symplyphysics.laws.waves.wavespeed_from_medium_refractive_index

.. py:data:: wave_speed

    Speed of wave propagation in medium. See :attr:`~symplyphysics.symbols.classical_mechanics.phase_speed`.

Symbol:
    :code:`v`

Latex:
    :math:`v`

Dimension:
    :code:`velocity`


.. py:data:: refractive_index

    :attr:`~symplyphysics.symbols.optics.relative_refractive_index` of the medium.

Symbol:
    :code:`n`

Latex:
    :math:`n`

Dimension:
    :code:`dimensionless`


.. py:data:: law

    :code:`v = c / n`


    Latex:
        .. math::
            v = \frac{c}{n}