Change in energy in the absorption spectrum is given as:
ΔE = E2 - E1 = 4.0 - 0.0 = 4.0 eV
The allowed energies of a simple atom are 0.0 eV, 4.0 eV, and 6.0 eV.
What wavelength(s) appear(s) in the atom's absorption spectrum?
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