Physics - Wave Optics Question with Solution | TestHub

In Young's double slit experiment with monochromatic light, fringes are obtained on a screen placed at some distance from the slits. If the screen is moved by $5\times 10^{-2}\mathrm{m}$ towards the slits, the change in fringe width is $3\times 10^{-5}\mathrm{m}$. If the separation between the slits is $10^{-3}\mathrm{m}$, the wavelength of light used is