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Electron exicted from lower orbit to hig...

Electron exicted from lower orbit to higher orbit and returns back to ground state from excited state with a life time1 nanosecond by emitting a photon of wave length 600nm. Calculate uncertainity in the energy of the excited state. Also calculate the percentage uncertainity, if the energy is measured from ground state.

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`(5.27 xx 10^(-26)J, 1.59 xx 10^(-5)%)`
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