(a) Obtain expressions for charge densities in $n$-type and $P$-type…

Previous year question for Applied Engineering Physics.

Question

(a) Obtain expressions for charge densities in $n$-type and $P$-type semiconductors. Give an expression for the mobility of a charge carrier. 10

(b) Describe the construction of a Nicol prism. Explain how it can be used as a polariser and as an analyzer. 10

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