- #1

- 26

- 0

## Homework Statement

Use

[tex][H_{0},r_{j}]=\frac{i\hbar}{\mu}p_{j}[/tex]

for the Hydrogen atom (where the j's denote the jth components in Cartesian coordinates) to prove that

[tex]<n_{f},l_{f},m_{l,f}|p_{j}|n_{i},l_{i},m_{l,i}>=-i\mu\omega<n_{f},l_{f},m_{l,f}|r_{j}|n_{i},l_{i},m_{l,i}>[/tex]

## Homework Equations

[tex][H_{0},r_{j}]=\frac{i\hbar}{\mu}p_{j}[/tex]

## The Attempt at a Solution

I'm really at a loss on how to begin here. I don't see how I can use the commutator to prove this.