- #1

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## Homework Statement

An infinite potential well with a box in the middle V = 100, the walls of the box go from -L/2 to L/2.

## Homework Equations

Schrodinger's equation.

## The Attempt at a Solution

Please help.

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- Thread starter element1945
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- #1

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An infinite potential well with a box in the middle V = 100, the walls of the box go from -L/2 to L/2.

Schrodinger's equation.

Please help.

- #2

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Infinite walls go from -L to L, L = 1 m.

- #3

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- #4

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An infinite potential well with a finite box inside. The walls of the infinite well go from -L to L.

The walls of the box go from -L/2 to L/2. Verify whether the following values of energy are permitted or not to the particle

a) E = 24 J

b) E = 26 J

c) E= 105 J

m = h bar /2 Kg

V = 100 J

L= 1 m

Schrodinger's equation. double derivative of phi with respect to x + 2m/hbar (E-V) phi = 0

Please help me I dont know how to relate these energies with Schrodinger's equation.

I know how to solve for a infinite potential well, but this one has a box inside with V = 100 J and I only know how to solve this with V = 0.

- #5

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How are E and V related?

Last edited:

- #6

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That's schrodingers equation simplified...

- #7

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what are bound states?

- #8

malawi_glenn

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what are bound states?

Look it up in your QM book

- #9

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- #10

malawi_glenn

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(where is my old post?)

I don't know if you dont have a QM book or not, it really helps alot while studying to have text books. And why didn't you just google bound states?

You are obligated to show attempt to solution according to forum rules, I really can't see that you are trying.

Look up in the tutorial session here for intro QM lecture notes, there are at least 2. Then you can google for "particle in a box problems".

How come you want to solve this problem if you don't have textbook? You must then have class notes or similar.

- #11

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- #12

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- #13

malawi_glenn

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How do you solve it for V = 0? How would you solve it for an arbitrary V?

- #14

turin

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I think element may mean a potential that looks like this:

where, by "box", maybe element means the bump in the middle?

EDIT: Thanks, Hurkyl.

Code:

```
| |
| |
| |
| |
| ____ |
|__| |__|
```

where, by "box", maybe element means the bump in the middle?

EDIT: Thanks, Hurkyl.

Last edited:

- #15

Hurkyl

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If you want equal-spaced formatting, wrap it in [ code ] .. [ /code ] tags.

- #16

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- #17

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the problem is just like the drawing of turin thanks

- #18

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but i dont know anything of pertubation theory

- #19

turin

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You don't need perturbation theory; however, I think you may get a transcendental equation or something (I don't remember exactly what the solution is like). You know how to do this if you have a uniform potential, V

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