Light pressure
==============

Light pressure is the pressure exerted by light radiation incident on the surface of a body.
Under normal light incidence on the surface, the light pressure depends only on the reflection
coefficient and the intensity of the radiation.

**Notation:**

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

**Links:**

#. `BYJU's, "Radiation pressure formula" <https://byjus.com/physics/radiation-pressure/>`__.

.. py:currentmodule:: symplyphysics.laws.optics.light_pressure

.. py:data:: pressure

    Light :attr:`~symplyphysics.symbols.classical_mechanics.pressure`.

Symbol:
    :code:`p`

Latex:
    :math:`p`

Dimension:
    :code:`pressure`


.. py:data:: intensity

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

Symbol:
    :code:`I`

Latex:
    :math:`I`

Dimension:
    :code:`power/area`


.. py:data:: reflection_coefficient

    :attr:`~symplyphysics.symbols.optics.reflectance` of the surface.

Symbol:
    :code:`R`

Latex:
    :math:`R`

Dimension:
    :code:`dimensionless`


.. py:data:: law

    :code:`p = I * (1 + R) / c`


    Latex:
        .. math::
            p = \frac{I \left(1 + R\right)}{c}