A point source of light is kept below the surface of water (nw = 4/3) at a depth of root 7 m. The radius of the circular bright patch of light noticed on the surface of water is ______ m. A point source of light is kept below the surface of water (nw = 4/3) at a depth of root 7 m. The radius of the circular bright patch of light noticed on the surface of water is ______ m. November 9, 2020 Category: Chapter 9 - Ray Optics , MTG NEET Physics , Part 1 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related