Two polaroids are oriented with their planes perpendicular to incident light and transmission axis making an angle `45^@` with each other. Find the fraction of incident light which is transmitted.

Explanation

To solve the problem of finding the fraction of incident light transmitted through two polaroids oriented at a 45-degree angle to each other, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Setup**:
- We have two polaroids. The first polaroid is oriented perpendicular to the incident unpolarized light, and the second polaroid is oriented at a 45-degree angle to the first.

2. **Intensity after the First Polaroid**:
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