Light of certain colour has 2000 waves to millimeter in air. what will be the wavelength of this light in a medium of refractive index 1.25? Light of certain colour has 2000 waves to millimeter in air. what will be the wavelength of this light in a medium of refractive index 1.25? November 8, 2020 Category: Chapter 9 - Ray Optics , MTG NEET Physics , Part 1 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related