We should note that this latter type of shift was successfully amplified to a considerable extent by Russian physicists using the intense light of a ruby laser whose wavelength is close to that of a transition of the potassium atom.
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“It's not enough to tell people to be creative; they need to know how, and what to create.”
“Now, on the St. Louis team we have Who's on first, What's on second, I Don't Know is on third.”