# finesse.constants¶

Physical constants module exposing a single named-tuple which contains each of the constants values.

This tuple is imported in the top-level Finesse module - allowing access to this structure with:

from finesse import constants

# get the speed of light for example
c = constants.C_LIGHT


The table below lists all of the constants exposed in this module.

Name

Description

Exact value used

C_LIGHT

The speed of light in m/s.

299792458.0

PI

Mathematical constant $$\pi$$.

3.14159265358979323846