Hi(adsbygoogle = window.adsbygoogle || []).push({});

Here is the number for the measured frequency for hydrogen 1s to 2s transition:

2 466 061 413 187 035 Hz

By way of interest, what is our most accurate theoretical calculation of this number? I've tried the ordinary Bohr formula and it is only accurate to about 4 places.

I'm also wondering if there is any Doppler frequency shift factor involved in the theoretical formula. Because the light emanates from (I presume) a moving source (electron in orbital).

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# State of the art on H line spectra?

**Physics Forums | Science Articles, Homework Help, Discussion**