pmutt.constants.h

pmutt.constants.h(units, bar=False)

Planck’s constant, h

Parameters:

• units (str) –

  Units for h. Supported units

  Unit	Description	Value (bar=False)
  J s	Joule second	6.626070040e-34
  kJ s	Kilojoule second	6.626070040e-37
  eV s	Electron volt second	4.135667662e-15
  Eh s	Hartree second	1.519829846E-16
  Ha s	Hartree second	1.519829846E-16

• bar (bool, optional) – If True, returns h/2*pi . Default is False

Returns:

h – Planck’s constant in appropriate units

Return type:

float

Raises:

KeyError – If units is not supported.