#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
Fundamental Physical Constants
==============================

Defines various constants from recommended values by the Committee on Data for
Science and Technology (CODATA).
"""

from __future__ import division, unicode_literals

__author__ = 'Colour Developers'
__copyright__ = 'Copyright (C) 2013 - 2014 - Colour Developers'
__license__ = 'New BSD License - http://opensource.org/licenses/BSD-3-Clause'
__maintainer__ = 'Colour Developers'
__email__ = 'colour-science@googlegroups.com'
__status__ = 'Production'

__all__ = ['AVOGADRO_CONSTANT',
           'BOLTZMANN_CONSTANT',
           'LIGHT_SPEED',
           'PLANCK_CONSTANT']

AVOGADRO_CONSTANT = 6.02214179e23
"""
Avogadro constant.

AVOGADRO_CONSTANT : numeric
"""

BOLTZMANN_CONSTANT = 1.38065e-23
"""
Boltzmann constant.

BOLTZMANN_CONSTANT : numeric
"""

LIGHT_SPEED = 299792458
"""
Speed of light in vacuum.

LIGHT_SPEED : numeric
"""

PLANCK_CONSTANT = 6.62607e-34
"""
Planck constant.

PLANCK_CONSTANT : numeric
"""
