A unpolarised light is passed through 3 polarisers. If the second polariser is at an angle `30^(@)` with the first and the third polariser is at an angle `60^(@)` with the second. Find the final intensity of the light passed through this combination in initial intensity was I.

Explanation

To solve the problem of unpolarized light passing through three polarizers, we will use Malus's Law, which states that when polarized light passes through a polarizer, the intensity of the transmitted light is given by:

\[ I = I_0 \cos^2(\theta) \]

where:
- \( I_0 \) is the initial intensity of the light,
- \( \theta \) is the angle between the light's polarization direction and the axis of the polarizer.

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