A photon with a wave-length of 410 nm has energy E_photon = 3.0 eV. Do you expect to see a spectral line with λ = 410 nm in the emission spectrum of the atom represented by this energy-level diagram? If so, what transition or transitions will emit it?

Do you expect to see a spectral line with λ= 410 nm in the absorption spectrum? If so, what transition or transitions will absorb it?

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n=4. n=3 6.0 eV 5.0 eV n=2 2.0 eV n = 1 0.0 eV