https://dspace.mit.edu/entities/publication/3af371c0-add0-49f1-8d79-4929abc91eea
A precision millimeter-wave measurement of the Rydberg frequency
The Rydberg frequency, cR[infinity], sets the frequency scale for the spectrum of hydrogen atoms. From a frequency measurement of one transition in hydrogen,...
millimeter waveof therydberg frequencyprecisionmeasurement