Choose the type of prism which was used in Biot's experiment.

Glass

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Nicol

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Sodium

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Diamond

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Solution

The correct option is B Nicol
The type of prism used in Biot’s experiment is called a Nicol prism. This is a special material which is able to polarise light passing through it.
You know that light normally vibrates in all possible planes when coming out of a source. But when passed through special devices like this Nicol prism it comes out vibrating in just one direction. This allows us to test for optical activity.

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