A lens is made of flint glass (refractive index = 1.5). When the lens is immersed in a liquid of refractive index 1.25, the focal length A lens is made of flint glass (refractive index = 1.5). When the lens is immersed in a liquid of refractive index 1.25 the focal length November 13, 2020 Category: AIIMS Last 24 Years Solved 1996 - 2019 Physics and Chemistry Video Solutions , Chapter 28 - Electromagnetic Waves , Physics , Facebook Messenger WhatsApp Share this:TwitterFacebook Related