Using his own version of Harry Potter’s cloak of invisibility, Rutgers professor Andrew Norris can help make underwater objects appear invisible. Norris, a distinguished professor in the Department of Mechanical and Aerospace Engineering at Rutgers University-New Brunswick, is developing honeycomb-like metallic structures that reroute sound waves to create the impression that both the cloak and anything beneath it are not there. Rutgers Today asked Norris to discuss his pioneering research, whic…