Physics - Wave Optics Question with Solution | TestHub

Two wavelengths ${\lambda }_1$ and ${\lambda }_2$ are used in Young's double slit experiment. ${\lambda }_1=450\mathrm{nm}$ and ${\lambda }_2=650\mathrm{nm}$. The minimum order of fringe produced by ${\lambda }_2$ which overlaps with the fringe produced by ${\lambda }_1$ is $n$. The value of $n$ is _____.