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# scipy.constants.lambda2nu

`scipy.constants.``lambda2nu`(lambda_)

  Convert wavelength to optical frequency

  Parameters : | lambda : array_like Wavelength(s) to be converted.
  Returns : | nu : float or array of floats Equivalent optical frequency.

  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])

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