Wave Optics: JEE Mains 2022 June 29 Shift 1

Using Young's double slit experiment, a monochromatic light of wavelength $5000\ \text{\AA}$ produces fringes of fringe width $0.5\ \text{mm}$. If another monochromatic light of wavelength $6000\ \text{\AA}$ is used and the separation between the slits is doubled, then the new fringe width will be: