• physics
• physics girl
• soliton
• falaco soliton
• vortex
• vortex ring
• bubble ring
• smoke ring
• vortices
• vortexes
• vortex plate
• plate
• pool

This unique phenomenon can be easily reproduced in a pool on a sunny day.

Subscribe - http://www.youtube.com/subscription_center?add_user=physicswoman
Twitter - http://twitter.com/thephysicsgirl
Facebook - https://www.facebook.com/PhysicsWoman
http://www.physicsgirl.org/

Many thanks to the Vlogbrothers for their sponsorship of this video!

Also thank you to Daniel Walsh for answering many fluid dynamics questions, to Jacob Schalch for filming the burning penny, and to Justin and Brendan for their donations to support Physics Girl!