If the monochromatic source in Young's double slit experiment is replaced by white light, then
If the monochromatic source in Young's double slit experiment is replaced by white light, then
There will be a central dark fringe surrounded by a few coloured fringes
There will be a central bright white fringe surrounded by a few coloured fringes
All bright fringes will be of equal width
Interference pattern will disappear
Solution
At central point on screen, path difference is zero for all wavelength. So, central bright fringe is white and other fringes depend on wavelength as $\beta=\frac{\lambda D}{d}$.
Therefore, other fringes will be coloured.