Definition:Rydberg Constant

Physical Constant
The Rydberg constant is used to express the limiting value of the highest wavenumber (inverse wavelength) of any photon that can be emitted from a hydrogen atom, or, alternatively, the wavenumber of the lowest-energy photon capable of ionizing a hydrogen atom from its ground state.


 * $R_\infty = \dfrac {m_\E \E^4} {8 \varepsilon_0^2 h^3 c}$

where:
 * $m_\E$ denotes the electron rest mass
 * $\E$ denotes the elementary charge
 * $\varepsilon_0$ denotes the vacuum permittivity
 * $h$ denotes Planck's constant
 * $c$ denotes the speed of light.

Also see

 * Definition:Rydberg Energy