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Basics
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Photons
-------

.. math::
	E = \frac{hc}{\lambda} = h\nu


Radiometry
----------
.. csv-table:: Key Radiometric Units
   :file: ./radiometric_units_table.csv
   :widths: 30,30,30
   :header-rows: 1

Spectral irradiance can equivalently be expressed as a function of light frequency, but it is much more common to use the wavelength.

Photometry
----------
.. csv-table:: Key Photometric Units
   :file: ./photometric_units_table.csv
   :widths: 30,30,30
   :header-rows: 1