scipy.constants.
lambda2nu#
- scipy.constants.lambda2nu(lambda_)[source]#
- Convert wavelength to optical frequency - Parameters:
- lambda_array_like
- Wavelength(s) to be converted. 
 
- Returns:
- nufloat or array of floats
- Equivalent optical frequency. 
 
 - Notes - Computes - nu = c / lambdawhere c = 299792458.0, i.e., the (vacuum) speed of light in meters/second.- lambda2nuhas 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=1and 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 Support for the array API standard for more information. - Examples - >>> from scipy.constants import lambda2nu, speed_of_light >>> import numpy as np >>> lambda2nu(np.array((1, speed_of_light))) array([ 2.99792458e+08, 1.00000000e+00])