devondehaven1116 devondehaven1116
  • 04-05-2018
  • Chemistry
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An excited state of a particular atom has a mean lifetime of 6.2×10−10 s , which we may take as the uncertainty δt.

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PBCHEM
PBCHEM PBCHEM
  • 11-05-2018
According to Heisenberg's Uncertainty Principle,
ΔE×Δt ≥  h/(4π)
where h = planck's constant = 6.63 × [tex] 10^{-34} [/tex] J.s

Hence, ΔE ≥ [tex] \frac{h}{4.pi.delta(t)} [/tex] = [tex] \frac{6.63X 10^{-34} }{4X3.142X6.2X 10^{-10}} [/tex]
∴, ΔE ≥ 8.5086 X [tex] 10^{-26} [/tex] J
 
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