;docformat = 'rst' ;+ ;Physical constants lookup function. All EVE functions which need physical ;constants should call this function rather than have them hard-coded. ; ;:Keywords: ; planck_constant: out, optional ; Planck's constant in SI units (J/Hz) ; speed_of_light: out, optional ; Vacuum speed of light in SI units (m/s) ; ;Authority for these constants is http://physics.nist.gov/cuu/Constants/index.html ;- pro eve_physical_constant,planck_constant=planck_constant,speed_of_light=speed_of_light planck_constant=6.62606957d-34 ;J/Hz, 6.62606957(29) x10^-34 J s, from http://physics.nist.gov/cgi-bin/cuu/Value?h speed_of_light=299792458d ;m/s, exact by definition of meter, http://physics.nist.gov/cgi-bin/cuu/Value?c end