Radiation intensity from energy, area, and time
===============================================

Intensity is a scalar physical quantity that quantitatively characterizes the power carried by
a wave in the direction of propagation per unit area per unit time.

**Links:**

#. `Wikipedia, derivable from here <https://en.wikipedia.org/wiki/Intensity_(physics)#Mathematical_description>`__.

.. py:currentmodule:: symplyphysics.laws.optics.radiation_intensity_from_energy_area_time

.. py:data:: intensity

    (Average) :attr:`~symplyphysics.symbols.basic.intensity` of incident radiation.

Symbol:
    :code:`I`

Latex:
    :math:`I`

Dimension:
    :code:`power/area`


.. py:data:: energy

    :attr:`~symplyphysics.symbols.basic.energy` of incident radiation.

Symbol:
    :code:`E`

Latex:
    :math:`E`

Dimension:
    :code:`energy`


.. py:data:: area

    :attr:`~symplyphysics.symbols.classical_mechanics.area`.

Symbol:
    :code:`A`

Latex:
    :math:`A`

Dimension:
    :code:`area`


.. py:data:: time

    :attr:`~symplyphysics.symbols.basic.time`.

Symbol:
    :code:`t`

Latex:
    :math:`t`

Dimension:
    :code:`time`


.. py:data:: law

    :code:`I = E / (A * t)`


    Latex:
        .. math::
            I = \frac{E}{A t}