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The axes of a polarizer and an analyzer ...

The axes of a polarizer and an analyzer are oriented at `30^(@)` to each other.
(a) If unpolarized light of intensity `I_(0)` is incident on them, what is the intensity of the transmitted light?
(b) Polarized light of intensity `I_(0)` is incident on this polarizer-analyzer system. If the amplitude of the light makes an angle of `30^(@)` with the axis of the polarizer, what is the intensity of the transmitted light?

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