Photoelectric EffectHard

Question

The highest energy state, that unexcited hydrogen atoms can reach when they are bombareded with 12.2 eV electron, is 

Options

A.n = 1
B.n = 2
C.n = 3
D.n = 4

Solution

ᐃE = 13.6 = 12.2
13.6 − 12.2 =
n2 = ⇒ n = 3

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