1 // Boost.Units - A C++ library for zero-overhead dimensional analysis and 2 // unit/quantity manipulation and conversion 3 // 4 // Copyright (C) 2003-2008 Matthias Christian Schabel 5 // Copyright (C) 2008 Steven Watanabe 6 // 7 // Distributed under the Boost Software License, Version 1.0. (See 8 // accompanying file LICENSE_1_0.txt or copy at 9 // http://www.boost.org/LICENSE_1_0.txt) 10 11 #ifndef BOOST_UNITS_CODATA_UNIVERSAL_CONSTANTS_HPP 12 #define BOOST_UNITS_CODATA_UNIVERSAL_CONSTANTS_HPP 13 14 #include <boost/units/quantity.hpp> 15 #include <boost/units/static_constant.hpp> 16 17 #include <boost/units/systems/detail/constants.hpp> 18 #include <boost/units/systems/si/capacitance.hpp> 19 #include <boost/units/systems/si/current.hpp> 20 #include <boost/units/systems/si/energy.hpp> 21 #include <boost/units/systems/si/force.hpp> 22 #include <boost/units/systems/si/length.hpp> 23 #include <boost/units/systems/si/mass.hpp> 24 #include <boost/units/systems/si/resistance.hpp> 25 #include <boost/units/systems/si/temperature.hpp> 26 #include <boost/units/systems/si/time.hpp> 27 #include <boost/units/systems/si/velocity.hpp> 28 #include <boost/units/systems/si/volume.hpp> 29 #include <boost/units/systems/si/codata/typedefs.hpp> 30 31 /// \file 32 /// CODATA recommended values of fundamental universal constants 33 /// using CODATA 2006 values as of 2007/03/30 34 35 namespace boost { 36 37 namespace units { 38 39 namespace si { 40 41 namespace constants { 42 43 namespace codata { 44 45 /// CODATA recommended values of the fundamental physical constants: NIST SP 961 46 47 // UNIVERSAL 48 /// speed of light 49 BOOST_UNITS_PHYSICAL_CONSTANT(c,quantity<velocity>,299792458.0*meters/second,0.0*meters/second); 50 /// magnetic constant (exactly 4 pi x 10^(-7) - error is due to finite precision of pi) 51 BOOST_UNITS_PHYSICAL_CONSTANT(mu_0,quantity<force_over_current_squared>,12.56637061435917295385057353311801153679e-7*newtons/ampere/ampere,0.0*newtons/ampere/ampere); 52 /// electric constant 53 BOOST_UNITS_PHYSICAL_CONSTANT(epsilon_0,quantity<capacitance_over_length>,8.854187817620389850536563031710750260608e-12*farad/meter,0.0*farad/meter); 54 /// characteristic impedance of vacuum 55 BOOST_UNITS_PHYSICAL_CONSTANT(Z_0,quantity<resistance>,376.7303134617706554681984004203193082686*ohm,0.0*ohm); 56 /// Newtonian constant of gravitation 57 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); 58 /// Planck constant 59 BOOST_UNITS_PHYSICAL_CONSTANT(h,quantity<energy_time>,6.62606896e-34*joule*seconds,3.3e-41*joule*seconds); 60 /// Dirac constant 61 BOOST_UNITS_PHYSICAL_CONSTANT(hbar,quantity<energy_time>,1.054571628e-34*joule*seconds,5.3e-42*joule*seconds); 62 /// Planck mass 63 BOOST_UNITS_PHYSICAL_CONSTANT(m_P,quantity<mass>,2.17644e-8*kilograms,1.1e-12*kilograms); 64 /// Planck temperature 65 BOOST_UNITS_PHYSICAL_CONSTANT(T_P,quantity<temperature>,1.416785e32*kelvin,7.1e27*kelvin); 66 /// Planck length 67 BOOST_UNITS_PHYSICAL_CONSTANT(l_P,quantity<length>,1.616252e-35*meters,8.1e-40*meters); 68 /// Planck time 69 BOOST_UNITS_PHYSICAL_CONSTANT(t_P,quantity<time>,5.39124e-44*seconds,2.7e-48*seconds); 70 71 } // namespace codata 72 73 } // namespace constants 74 75 } // namespace si 76 77 } // namespace units 78 79 } // namespace boost 80 81 #endif // BOOST_UNITS_CODATA_UNIVERSAL_CONSTANTS_HPP 82