The rydberg constant
is named after physicist Janne Rydberg
, and is a physical constant
discovered when measuring the spectrum
, and building upon results from Anders Jonas Ångström
and Johann Balmer. Each chemical element
has it's own Rydberg constant, but most commonly referred to is the "infinity" constant.
The "infinity" Rydberg constant is:
The "infinity" constant appears in the formula:
Which gives the Rydberg constant for a certain atom
with one electron
with the rest mass
and the atomic nucleus
mass . And can be derived from the formula:
As the formula for the Rydberg constant contains no less than five
other physical constants
, namely the elementary charge
, the electron rest mass
, the permittivity
of vacuum , Planck's constant
, and the speed of light
, it is one of the most well-determined physical constants. Measuring the Rydberg constant namely confirms the proportions of the values of the other five constants.
For more information about this formula, see the article on the Rydberg formula.