Two lenses of power −15D and +5D are in contact with each other. The focal length of the combination is Two lenses of power −15D and +5D are in contact with each other. The focal length of the combination is November 18, 2020 Category: Chapter 16 - Optics , JEE Mains Physics 2002-2019 Solved Video Solutions , Facebook Messenger WhatsApp Share this:TwitterFacebook Related