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Ezequiel
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Homework Statement
A Na atom is in an excited state for a mean time of [itex]1.6 \times 10^{-8}s[/itex]. Then it jumps to the ground state emitting a photon with 2.105 eV of energy. Find the energy uncertainty of that excited state.
Homework Equations
The Attempt at a Solution
I don't even know where to start. Any help would be appreciated!