Question Statement:
Match the physical effects and order of magnitude of their energy scales given below,
where 𝛼 =
e2
4𝜋𝜖0ℏc is fine structure constant; me and mp are electron and proton mass,
respectively.
Group I Group II
P: Lamb shift 1: ~𝒪(𝛼2mec2)
Q: Fine structure 2: ~𝒪(𝛼4mec2)
R: Bohr energy 3: ~𝒪(𝛼4me
2c2/mp)
S: Hyperfine structure 4: ~𝒪(𝛼5mec2)
(A) P-3, Q-1, R-2, S-4 (B) P-2, Q-3, R-1, S-4
(C) P-4, Q-2, R-1, S-3 (D) P-2, Q-4, R-1, S-3
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