Calculate the ratio of 4th Bohr's to 2nd Bohr's orbit of `He^(+)` ion.

Explanation

To calculate the ratio of the radius of the 4th Bohr orbit to the radius of the 2nd Bohr orbit for the \( He^{+} \) ion, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Formula for Bohr Orbit Radius**:
The radius of the nth Bohr orbit is given by the formula:
\[
R_n = \frac{0.529 \, \text{Å} \cdot n^2}{Z}
...