Photon energy is proportional to linear frequency
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Photon is the elementary part of any electromagnetical radiation, having no mass and moving with speed of light
in any reference frame. The energy of a photon depends only on its frequency.

**Notation:**

#. :math:`h` (:code:`h`) is :attr:`~symplyphysics.quantities.planck`.

**Links:**

#. `Wikipedia <https://en.wikipedia.org/wiki/Photon#Relativistic_energy_and_momentum>`__.

.. py:currentmodule:: symplyphysics.laws.waves.photon_energy_is_proportional_to_linear_frequency

.. py:data:: energy

    :attr:`~symplyphysics.symbols.basic.energy` of a photon.

Symbol:
    :code:`E`

Latex:
    :math:`E`

Dimension:
    :code:`energy`


.. py:data:: frequency

    :attr:`~symplyphysics.symbols.classical_mechanics.temporal_frequency` of a photon.

Symbol:
    :code:`f`

Latex:
    :math:`f`

Dimension:
    :code:`frequency`


.. py:data:: law

    :code:`E = h * f`


    Latex:
        .. math::
            E = h f