Some energy levels of a molecule are shown in the figure, with wavelengths λ₁, λ₂ and λ₃ of three transitions. Which given relation is correct? [Image]
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Some energy levels of a molecule are shown in the figure, with wavelengths λ₁, λ₂ and λ₃ of three transitions. Which given relation is correct? [Image]

G1 Physics · Accepted Answer

For each photon, λ = hc/ΔE. From the displayed energy diagram the transition energies for λ₁, λ₂ and λ₃ are 2E, E and 1.5E, respectively. Thus λ₂ = 2λ₁ and λ₂ > λ₃; compare the relations in the source diagram. The source key selects D.