Why Does Energy Behavior Differ in Particle in a Box Model Versus Bohr's Theory?

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SUMMARY

The discussion clarifies the apparent contradiction between the energy behavior in the Particle in a Box model and Bohr's Theory. In the Particle in a Box model, energy increases with the principal quantum number "n," while Bohr's Theory shows energy decreasing due to the n² term in the denominator. However, the negative sign in Bohr's equation indicates that as "n" increases, the energy becomes less negative, effectively increasing as it approaches zero. Thus, both models demonstrate an increase in energy with increasing "n," albeit through different mathematical representations.

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  • Understanding of quantum mechanics principles
  • Familiarity with the Particle in a Box model
  • Knowledge of Bohr's Theory of hydrogen atom
  • Basic grasp of quantum numbers and their significance
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Lizwi
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Hi, Please help me I am lost. I particle in a box model , equation for energy show that the energy increases as n increases, but in Borh's theory n^2 is in the denominator showing that as n increase, the energy decrease, I see the condradiction here. Am I right?
 
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Why should we apply Bohr's model to a particle in a box? Regardless, note the negative sign in Bohr's equation. As the principal quantum number "n" increases the energy because less negative. So in both cases its getting higher.
 
The Bohr energy is increasing even with n2 in denominator, because there is a negative sign. The energy is getting closer to zero from below - thus it is increasing.
 

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