Physics - Wave Optics Question with Solution | TestHub

In Young's double-slit experiment, two wavelengths${\lambda }_1=780 \mathrm{n}\mathrm{m}$and${\lambda }_2=520 \mathrm{n}\mathrm{m}$are used to obtain interference fringes. If the$n^{th}$bright band due to${\lambda }_1$coincides with${\left(n+1\right)}^{th}$bright band due to${\lambda }_2$, then the value of$n$is