More Black Hole videos from Sixty Symbols: http://bit.ly/Black_Hole_Videos The Black Hole Laboratory at the University of Nottingham uses a special water tank and cameras to simulate and measure some conditions near a black hole. Interview with Dr Silke Weinfurtner. The Black Hole Lab: http://bit.ly/BH_Lab Electric Slide Rule from Numberphile: https://youtu.be/MEyIppEOQTw Visit our website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/sixtysymbols This project features scientists from The University of Nottingham http://bit.ly/NottsPhysics Sixty Symbols videos by Brady Haran http://www.bradyharanblog.com Email list: http://eepurl.com/YdjL9 Sixty Symbols Patreon: https://www.patreon.com/sixtysymbols