Uncertainty Principle, Energy and Position

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SUMMARY

The discussion centers on applying the uncertainty principle to demonstrate that electrons with energies in the range of a few electronvolts (eV) can be confined within atomic dimensions, specifically 0.1 nm. The relevant equations include the position-momentum uncertainty relation, \(\Delta x \Delta p \geq \hbar / 2\), and the energy-time uncertainty relation, \(\Delta E \Delta t \geq \hbar / 2\). The value of \(\hbar\) is given as 6.58 x 10-16 eV·s. The challenge lies in deriving the energy-position uncertainty relation to complete the proof.

PREREQUISITES
  • Understanding of quantum mechanics principles, particularly the uncertainty principle.
  • Familiarity with the concept of electron energies in atoms, specifically in the range of a few eV.
  • Knowledge of fundamental physics equations, including kinetic energy and momentum equations.
  • Basic grasp of atomic dimensions, particularly the scale of 0.1 nm.
NEXT STEPS
  • Research the derivation of the energy-position uncertainty relation in quantum mechanics.
  • Study the implications of the uncertainty principle on electron behavior in atomic structures.
  • Explore the relationship between kinetic energy and momentum in quantum systems.
  • Investigate the role of Planck's constant in quantum mechanics and its applications in atomic physics.
USEFUL FOR

Students and educators in physics, particularly those studying quantum mechanics, as well as researchers interested in atomic structure and electron behavior.

MrJohnnyPrice
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Homework Statement



Electrons in atoms are known to have energies in the range of a few eV. Show that the uncertainty principle allows electrons of this energy to be confined in a region the size of an atom (0.1 nm)

Homework Equations



\Deltax\Deltap \geq h bar / 2

\DeltaE\Deltat \geq h bar / 2

The Attempt at a Solution



h bar = 6.58 x 10^-16 eV * s
\Deltax = .1 nm

I know that if there was an uncertainty relationship between Energy and displacement I could set h bar and \Deltax to the values given and show that this is possible, but I can't figure out how to find an energy position uncertainty relation.
 
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