# CG coefficient in Wigner Eckhart Theorem-how to find

## Homework Statement

The Clebsh Gordon coefficient is < 11;00 |11> = < l_1,m_1;l_2m_2 | kq >

## Homework Equations

My professor determined the CG to be 1

## The Attempt at a Solution

How do we look up these numbers in the table? What is the direct product basis? 1x1? What is JM and what is m_1 and m_2... very confused. Any help greatly appreciated

$$|J,m_j\rangle = \sum_{m_1} \sum_{m_2} C_{m_1m_2} |l_1,m_1\rangle |l_2,m_2\rangle$$