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An electron is in an excited state 2.75eV above the ground state. The lifetime of the...

An electron is in an excited state 2.75eV above the ground state. The lifetime of the excited state is 0.22μs. (a) What is the frequency of the emitted photon? (b) What is the uncertainty in the frequency according to the Heisenberg uncertainty principle?

Frequency: 6.6488*10^14 Hz

Δf= 3.617*10^5 Hz

(both answers I got are wrong)

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