Write the relation between kinetic energy of `alpha`- particle and its distance of closest approach from nucleus in Rutherford `alpha`-scattering experiment.

Explanation

To derive the relation between the kinetic energy of an alpha particle and its distance of closest approach from the nucleus in the Rutherford alpha scattering experiment, we can follow these steps:

### Step-by-Step Solution:

1. **Define the Kinetic Energy of the Alpha Particle**:
The kinetic energy (KE) of an alpha particle with mass \( m \) and velocity \( u \) is given by the formula:
\[
KE = \frac{1}{2} m u^2
...