Wave Optics

In the young's double slit experiment the fringe width of the interference pattern is found to be \(3.2 \times 10^{-4} \mathrm{~m}\), when the light of wave length \(6400^{\circ} \mathrm{A}\) is used. What will be change in fringe width if the light is replaced with a light of wave length \(4800^{\circ} \mathrm{A}\)