si/codata/universal_constants.hpp

0001 // Boost.Units - A C++ library for zero-overhead dimensional analysis and
0002 // unit/quantity manipulation and conversion
0003 //
0004 // Copyright (C) 2003-2008 Matthias Christian Schabel
0005 // Copyright (C) 2008 Steven Watanabe
0006 //
0007 // Distributed under the Boost Software License, Version 1.0. (See
0008 // accompanying file LICENSE_1_0.txt or copy at
0009 // http://www.boost.org/LICENSE_1_0.txt)
0010
0011 #ifndef BOOST_UNITS_CODATA_UNIVERSAL_CONSTANTS_HPP
0012 #define BOOST_UNITS_CODATA_UNIVERSAL_CONSTANTS_HPP
0013
0014 #include <boost/units/quantity.hpp>
0015 #include <boost/units/static_constant.hpp>
0016
0017 #include <boost/units/systems/detail/constants.hpp>
0018 #include <boost/units/systems/si/capacitance.hpp>
0019 #include <boost/units/systems/si/current.hpp>
0020 #include <boost/units/systems/si/energy.hpp>
0021 #include <boost/units/systems/si/force.hpp>
0022 #include <boost/units/systems/si/length.hpp>
0023 #include <boost/units/systems/si/mass.hpp>
0024 #include <boost/units/systems/si/resistance.hpp>
0025 #include <boost/units/systems/si/temperature.hpp>
0026 #include <boost/units/systems/si/time.hpp>
0027 #include <boost/units/systems/si/velocity.hpp>
0028 #include <boost/units/systems/si/volume.hpp>
0029 #include <boost/units/systems/si/codata/typedefs.hpp>
0030
0031 /// \file
0032 /// CODATA recommended values of fundamental universal constants
0033 /// using CODATA 2006 values as of 2007/03/30
0034
0035 namespace boost {
0036
0037 namespace units {
0038
0039 namespace si {
0040
0041 namespace constants {
0042
0043 namespace codata {
0044
0045 /// CODATA recommended values of the fundamental physical constants: NIST SP 961
0046
0047 // UNIVERSAL
0048 /// speed of light
0049 BOOST_UNITS_PHYSICAL_CONSTANT(c,quantity<velocity>,299792458.0*meters/second,0.0*meters/second);
0050 /// magnetic constant (exactly 4 pi x 10^(-7) - error is due to finite precision of pi)
0051 BOOST_UNITS_PHYSICAL_CONSTANT(mu_0,quantity<force_over_current_squared>,12.56637061435917295385057353311801153679e-7*newtons/ampere/ampere,0.0*newtons/ampere/ampere);
0052 /// electric constant
0053 BOOST_UNITS_PHYSICAL_CONSTANT(epsilon_0,quantity<capacitance_over_length>,8.854187817620389850536563031710750260608e-12*farad/meter,0.0*farad/meter);
0054 /// characteristic impedance of vacuum
0055 BOOST_UNITS_PHYSICAL_CONSTANT(Z_0,quantity<resistance>,376.7303134617706554681984004203193082686*ohm,0.0*ohm);
0056 /// Newtonian constant of gravitation
0057 BOOST_UNITS_PHYSICAL_CONSTANT(G,quantity<volume_over_mass_time_squared>,6.67428e-11*cubic_meters/kilogram/second/second,6.7e-15*cubic_meters/kilogram/second/second);
0058 /// Planck constant
0059 BOOST_UNITS_PHYSICAL_CONSTANT(h,quantity<energy_time>,6.62606896e-34*joule*seconds,3.3e-41*joule*seconds);
0060 /// Dirac constant
0061 BOOST_UNITS_PHYSICAL_CONSTANT(hbar,quantity<energy_time>,1.054571628e-34*joule*seconds,5.3e-42*joule*seconds);
0062 /// Planck mass
0063 BOOST_UNITS_PHYSICAL_CONSTANT(m_P,quantity<mass>,2.17644e-8*kilograms,1.1e-12*kilograms);
0064 /// Planck temperature
0065 BOOST_UNITS_PHYSICAL_CONSTANT(T_P,quantity<temperature>,1.416785e32*kelvin,7.1e27*kelvin);
0066 /// Planck length
0067 BOOST_UNITS_PHYSICAL_CONSTANT(l_P,quantity<length>,1.616252e-35*meters,8.1e-40*meters);
0068 /// Planck time
0069 BOOST_UNITS_PHYSICAL_CONSTANT(t_P,quantity<time>,5.39124e-44*seconds,2.7e-48*seconds);
0070
0071 } // namespace codata
0072
0073 } // namespace constants
0074
0075 } // namespace si
0076
0077 } // namespace units
0078
0079 } // namespace boost
0080
0081 #endif // BOOST_UNITS_CODATA_UNIVERSAL_CONSTANTS_HPP