Find out energy stored in an imaginary cubical volume of side a in front of a infinitely large non-conducting sheet of uniform charge density `sigma`.

Explanation

To find the energy stored in an imaginary cubical volume of side \( a \) in front of an infinitely large non-conducting sheet of uniform charge density \( \sigma \), we can follow these steps:

### Step 1: Determine the Electric Field
The electric field \( E \) due to an infinitely large non-conducting sheet with uniform charge density \( \sigma \) is given by the formula:
\[ E = \frac{\sigma}{2 \epsilon_0} \]
where \( \epsilon_0 \) is the permittivity of free space.
...