APFIVE Electron Transition in a Helium Ion
A He⁺ ion (Z=2 with one electron) in its ground state absorbs a photon and the electron transitions to the n=3 level. What is the energy of this photon in terms of the Rydberg energy (ER)?
A
(2ER)(1 - 1/9)
B
(4ER)(1 - 1/9)
C
(ER)(1 - 1/9)
D
(4ER)(1/4 - 1/9)
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