The figure represents two identical slits in a Young�s double slit experiment. The width of
Channel: Doubtnut
Date: 2020-02-20

The figure represents two identical slits in a Young�s double slit experiment. The width of each slit is b and distance between the centres of the two slits is d. Consider a point P on the screen that is close to centre of the screen. `Delta?x_(t)` represents the optical path difference to point P from the top edges of the two slits and `Delta?x_(b)` represents the optical path difference to P from the bottom edges of the two slits. Find` Delta?x_(b) � Delta?x_(t)`. It is given that `D gtgt d.`