Q .     The distance of `n^{th}` bright band on the screen from the central bright band on either sides of central bright band is __________.

MHCET 2013
A

`\displaystyl e x_n=\frac{n\lambda D}{d}`

B

`\displaystyl e x_n=(2n-1)\frac{\lambda D}{d}`

C

`\displaystyl e x_n=\frac{n\lambda d}{D}`

D

`\displaystyl e x_n=(2n-1)\frac{\lambda D}{2d}`

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