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)((Nlambda)/(d))`
B. `sin^(-1)(((N+ (1)/(2))lambda)/(d))`
C. `sin^(-1)((Nlambda)/(D))`
D. `sin^(-1)(((N+ (1)/(2))lambda)/(D))`

Answer

A

Explanation

For bright- `dsintheta= nlambda`
`implies sintheta= (nlambda)/(d)`
`implies theta= sin^(-1)((Nlambda)/(d))` [as n= N]