em_wavelength

plasmapy.formulary.laser.em_wavelength( angular_frequency: Annotated[Quantity, Unit('rad / s')], ) → Annotated[Quantity, Unit('m')][source]

Calculate the wavelength of a laser \(\lambda\) given the angular frequency \(\omega\).

The wavelength of an electromagnetic wave \(\lambda\) is calculated using:

\[\lambda = \frac{2\pi c}{\omega},\]

where \(\omega\) is the angular frequency of the beam.

Parameters:: angular_frequency (Quantity) – angular frequency of the laser beam (convertible to rad / s).
Returns:: wavelength – The wavelength of a laser with a given angular frequency.
Return type:: Quantity

Notes

For details, see Ling et al. [2016].

Examples

>>> import astropy.units as u
>>> em_wavelength(2.354307546e15 * u.rad / u.s)
<Quantity 8e-07 m>