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Atoms have quantized energy levels similar to those of Planck’s oscillators, although the energy levels of an atom are usually not evenly spaced. When an atom makes a transition between states separated in energy by DE,energy is emitted in the form of a photon of frequency f . Although an excited atom can radiate at any time from t= 0 to t =infinity, the average time interval after excitation during which an atom radiates iscalled the lifetime Ʈ. If Ʈ =1.0 × 10-8 s, use the uncertainty principle to compute the line width Δ f produced by this finite lifetime

          Atoms have quantized energy levels similar to those of Planck’s oscillators, although the energy levels of an atom are usually not evenly spaced. When an atom makes a transition between states separated in energy by DE,energy is emitted in the form of a photon of frequency f . Although an excited atom can radiate at any time from t= 0 to t =infinity, the average time interval after excitation during which an atom radiates iscalled the lifetime Ʈ. If Ʈ =1.0 × 10-8 s, use the uncertainty principle to compute the line width Δ f produced by this finite lifetime

Added by Justin S.

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