To reduce the intensity of incident unpolarised light to `1//4`, find the angle at which the axes of two polaroids should be placed.

Explanation

To solve the problem of reducing the intensity of incident unpolarized light to \( \frac{1}{4} \) using two polaroids, we can follow these steps:

### Step 1: Understand the behavior of unpolarized light through a polarizer
When unpolarized light passes through a single polarizer, the intensity of the transmitted light is reduced to half of the incident intensity. If the initial intensity of the unpolarized light is \( I \), then after passing through the first polarizer, the intensity \( I_1 \) is given by:
\[ I_1 = \frac{I}{2} \]

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