In a double$-$slit experiment, monochromatic light with an unknown wavelength passes through slits separated by $0\mathrm{.}0215$ mm$.$ The light projects an interference pattern on a screen located $1\mathrm{.}04$ m away from the slits. The distance between the central bright fringe and the first$-$order fringe is measured to be $2\mathrm{.}00$ cm$.$ What is the wavelength in nanometers $($nm$)$ of the incident light?