- #1

- 4

- 0

## Homework Statement

Let

**e**and

**f**be unit vectors. L

_{e}=

**eL**is the definition of the component of angular momentum in direction

**e**. Calculate the commutator [L

_{e},L

_{f}] in terms of

**e**,

**f**and

**L**

## Homework Equations

[A,B]=(AB-BA)

## The Attempt at a Solution

we know that L=r x p, in classical mechanics, and in quantum physics we have the operators for angular momentum in cartesian coordinates for example, but in my problem I have just two direction, e and f, and I am obtaining as answering 0. How can I do this exercise ? thanks