scipy.constants.

nu2lambda#

scipy.constants.nu2lambda(nu)[source]#

Convert optical frequency to wavelength.

Parameters:

nuarray_like: Optical frequency to be converted.

Returns:

lambdafloat or array of floats: Equivalent wavelength(s).

Notes

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

Array API Standard Support

nu2lambda has support for Python Array API Standard compatible backends in addition to NumPy. 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 nu2lambda, speed_of_light
>>> import numpy as np
>>> nu2lambda(np.array((1, speed_of_light)))
array([  2.99792458e+08,   1.00000000e+00])