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A fringe width of a certain interference...

A fringe width of a certain interference pattern is `beta=0.002` cm What is the distance of 5th dark fringe centre?

A

`1xx10^(-2)cm`

B

`11xx10^(-2)cm`

C

`1.1xx10^(-2)cm`

D

`9xx10^(-3)cm`

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The correct Answer is:
D
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