scipy.constants.lambda2nu¶

scipy.constants.lambda2nu(lambda_)¶

Convert wavelength to optical frequency

Parameters :

lambda : float-like scalar or array-like

Wavelength(s) to be converted

Returns :

nu : float or a numpy array of floats, corresponding to type of Parameters

Equivalent optical frequency(ies)

Notes

Computes $\nu = c / \lambda$ where c = 299792458.0, i.e., the (vacuum) speed of light in meters/second.

Examples

>>> from scipy.constants.constants import lambda2nu
>>> lambda2nu(np.array((1, speed_of_light)))
array([  2.99792458e+08,   1.00000000e+00])