Q273 · Practice questionSimple familiar1 mark
QUESTION 273
An atom has three bound energies , and . An electron starts in the middle level. Ignore recoil, line broadening and multiphoton processes. Which photon can cause a transition to another bound level?
(A)
(B)
(C)
(D)
WORKED SOLUTION
1 markAnswer B
ANSWER
B.
Worked solution
Absorption raises the electron energy. The only higher bound level requires . A photon can ionise from the middle level but cannot end at a bound level in this stated model.
Equivalent physically justified methods, alternative valid sketches and consistent units accepted.
Accept sensible significant figures and consistent rounding from stated constants.
Select B.
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