This article shows how a simple Christmas ribbon can be used to demonstrate a relatively complex physical phenomenon: the conservation of helicity during magnetic reconnection. The physical term, helicity, and the process of magnetic reconnection will be introduced and explained in detail. The ‘‘helicity meter,’’ a very simple device that will help in the determination of the helicity of certain topological configurations, will also be introduced.
This content is only available via PDF.
© 1991 American Association of Physics Teachers.
1991
American Association of Physics Teachers
AAPT members receive access to the American Journal of Physics and The Physics Teacher as a member benefit. To learn more about this member benefit and becoming an AAPT member, visit the Joining AAPT page.
