A) \[(\mu -1)\alpha \]
B) \[2(\mu -1)\alpha \,a\]
C) \[2(\mu -1)\alpha \,\]
D) \[(\mu -1)\alpha \,a\]
Correct Answer: B
Solution :
In the experiment of biprism, the distance between sources is because of deviation produced by two small angled prism. We know that the deviation produced by each prism is \[(\mu -1)\alpha .\] The total deviation is given by\[2(\mu -1)\alpha .\]. Again the separation of sources is given by \[=2(\mu -1)\,\alpha \,a\]
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