`scipy.constants._constants:lambda2nu`

source: /scipy/constants/_constants.py :308

Signature

def lambda2nu ( lambda_ : npt.ArrayLike ) → Any

Summary

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.

Array API Standard Support

lambda2nu has experimental support for Python Array API Standard compatible backends in addition to NumPy. Please consider testing these features by setting an environment variable SCIPY_ARRAY_API=1 and providing CuPy, PyTorch, JAX, or Dask arrays as array arguments. The following combinations of backend and device (or other capability) are supported.

====================  ====================  ====================
Library               CPU                   GPU
====================  ====================  ====================
NumPy                 ✅                     n/a                 
CuPy                  n/a                   ✅                   
PyTorch               ✅                     ✅                   
JAX                   ✅                     ✅                   
Dask                  ✅                     n/a                 
====================  ====================  ====================

See dev-arrayapi for more information.

Examples

from scipy.constants import lambda2nu, speed_of_light
import numpy as np

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lambda2nu(np.array((1, speed_of_light)))

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Aliases

scipy.constants.lambda2nu