Unpolarized light passes through a polarizer and analyser which are at an angle of `45^@` with respect to each other. The intensity of polarized light coming from analyser is `5W//m^2`. Find the intensity of unpolarized light incident on polarizer.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Understand the scenario
We have unpolarized light passing through a polarizer and an analyzer. The polarizer and analyzer are at an angle of \(45^\circ\) to each other. The intensity of the light after passing through the analyzer is given as \(5 \, \text{W/m}^2\).

### Step 2: Apply the formula for intensity after the polarizer
When unpolarized light of intensity \(I_0\) passes through a polarizer, the intensity of the light after the polarizer, \(I_p\), is given by:
\[
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