Abstract
Abstract
This article presents a simple demonstration that can be used in high
school/introductory college level courses to explain the meaning of
½-spin of fermions like electrons. One can use a simple-to-construct
Möbius strip to distinguish 2π and 4π rotations of a point moving on
the strip. This idea can then be extended to a pointer/arrow (in classroom
settings, say a pen representing a classical analogue to the intrinsic spin
vector), to show how a 4π rotation is needed to return the pointer, to its
initial configuration with respect to the strip.
Subject
General Physics and Astronomy,Education