grapa.shared.constants.Constants

class grapa.shared.constants.Constants

Bases: object

A number of physical constants, expressed in SI units.

Suggestion: import the instance CST created below, and use e.g. CST.c, CST.hbar etc.

__init__()

Definition of the SI unit system

Methods

__init__()

Definition of the SI unit system

Attributes

DeltaNu_Cs	..., in Hz
K_cd	Luminous efficacy of monochromatic radiation of frequency 540e12 Hz.
N_A	Avogadro constant, mol-1
STC_T	Standard test condition STC: temperature, in K
c	Speed of light, in m/s
epsilon0	vacuum permittivity epsilon0, in F m-1
h	Planck constant, in J s
hbar	Reduced Planck constant, in J s
kb	Boltzmann constant, in J K-1
mu0	vacuum magnetic permittivity, in N A-2
nm_eV	To convert photon energy (eV) into wavelength (nm)
q	Elementary charge, in C

property DeltaNu_Cs

…, in Hz

property K_cd

Luminous efficacy of monochromatic radiation of frequency 540e12 Hz. lm W-1

property N_A

Avogadro constant, mol-1

property STC_T

Standard test condition STC: temperature, in K

property c

Speed of light, in m/s

property epsilon0

vacuum permittivity epsilon0, in F m-1

property h

Planck constant, in J s

property hbar

Reduced Planck constant, in J s

property kb

Boltzmann constant, in J K-1

property mu0

vacuum magnetic permittivity, in N A-2

property nm_eV

To convert photon energy (eV) into wavelength (nm)

property q

Elementary charge, in C