R' constant in
Balmer's
formula is connected with Rydberg's
constant R,
or ionisation energy of hydrogen atom
with a dependence
R’=R/hc,
where c is the speed of light and h
Planck's constant.
Rydberg's
constant in energetic units [eV] is R=13,6 eV
and in "spectroscopic" units is: 6,7,8,9,10, pardòn 109 678 cm-1.
