In a Young's double slit experiment (slit distance d) monochromatic light of wavelength `lambda` is used and the figure pattern observed at a distance L from the slits. The angular position of the bright fringes are

Options

A. `sin^(-1)((n lambda)/(d))`
B. `sin^(-1)(((n+(1)/(2))lambda)/(d))`
C. `sin^(-1)((n lambda)/(L))`
D. `sin^(-1)(((n+(1)/(2))lambda)/(L))`

Answer

A

Explanation

For constructive interference
Path difference `Delta=d sin theta=n lambda`
The angular position of bright finges
`theta=sin^(-1)[(n lambda)/(d)]`