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A parallel beam of light of wavelength `lamda ` is incident normally on a single slit of width d. Diffraction bands are obtained on a screen placed at a distance D from the slit . The seond dark band from the central bright band will be at a distance given by

A

` ( 2 lamda D )/(d )`

B

` lamda dD `

C

` ( lamda D) /( 2 d )`

D

` ( 2 lamda d ) /( D) `

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