APFIVE Hydrogen Atom Photon Emission Wavelength
A hydrogen atom emits a photon when an electron transitions from the n=4 to the n=2 energy level. If the energy levels are given by En = -13.6 eV/n², what is the wavelength of the emitted photon?
A
486 nm
B
122 nm
C
972 nm
D
243 nm
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