$5$ In a double$-$slit experiment it is found that blue light of wavelength $460$ nm gives a second$-$order maximum at certain location on the screen. What wavelength of the visible light would have a minimum at the same location?

Answer: $\backslash (\backslash$quad $613\backslash$mathbf$\{$n m$\}\backslash )($orange$)$