Compute the angular momentum in 4th orbit, if L is the angular momentum of the electron in the 2nd orbit of hydrogen atom.

Explanation

To compute the angular momentum in the 4th orbit of a hydrogen atom, given that L is the angular momentum of the electron in the 2nd orbit, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the formula for angular momentum in hydrogen atom:**
The angular momentum \( L_n \) of an electron in the nth orbit of a hydrogen atom is given by the formula:
\[
L_n = \frac{n h}{2 \pi}
...