## Particle in a box (textbook) [ENDORSED]

$E_{n}=\frac{h^{2}n^{2}}{8mL^{2}}$

Jonghwee Park 1K
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### Particle in a box (textbook)

The textbook explains the "particle in a box" concept and says "the idea to keep in mind is that only certain wavelengths can exist in the box." Can someone explain this further? Why is it called a "particle in a box" and how does it prove that only certain wavelengths can exist? Also, what does the "box" refer to?

Chem_Mod
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### Re: Particle in a box (textbook)

The particle is being modeled as a wave, just like we modeled the electron as a wave. In class we discussed that for the wave model of the electron there had to be a whole wavelengths for it to be stable (refer to class notes on circular standing wave).

Nawaphan Watanasirisuk 3B
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### Re: Particle in a box (textbook)

Did he mention particle in a box in lecture briefly and I missed it or is it just in the textbook?

Chem_Mod
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### Re: Particle in a box (textbook)  [ENDORSED]

As I discussed in class we are not covering particle in a box (hence no homework assigned on it).

Henri_de_Guzman_3L
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### Re: Particle in a box (textbook)

Basically think of what a wavelength is. It is the distance from one "peak" to another "peak." Think of a wavelength in a "box." It is bounded on 2 sides right? Therefore only a certain wavelength can "fit" into this box. A bigger or smaller wavelength will be discontinuous.