Q7 of 37 Page 1

The shape of the interference fringes in Young’s double slit experiment when D (distance between slit and screen) is very large as compared to fringe width is nearly

In Young’s double slit experiment, all fringes are of equal width. Fringe width is given by



Where, is fringe width, is wavelength, D is distance between slit and screen and d is the distance between two slits.


If D


Since, where n= 1,2,3…..


Where, x is the position of point observed from central maxima. Therefore, the shape of the interference fringes will be hyperbolic.

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