Packet 8: Bonus 20

Arnold Sommerfeld studied hypothetical elliptical orbits in this system. For 10 points each:
[10e] Name this atom described by the Bohr model, which consists of one electron orbiting one proton.
ANSWER: hydrogen [or H-one]
[10h] While studying the Bohr model, Sommerfeld discovered this dimensionless coupling constant for the electromagnetic force, whose value is very close to 1/137.
ANSWER: fine structure constant [prompt on Sommerfeld constant]
[10m] The fine structure constant quantifies the splitting of these features whose “emission” and “absorption” examples result from electronic transitions. The Rydberg formula describes these features in hydrogen, which has a 21-centimeter one.
ANSWER: spectral lines [accept emission lines or absorption lines or 21-centimeter line]
<Physics — Sarah Benner> | SHOW-ME Four Packet 8

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