Here is a quick demo I made to show this conservation of angular momentum. It's not the best demo, but I put it together rather quickly. Let's see how this works.

That's where the phrase “conservation of angular momentum” comes from. The classic example of this is a spinning ice skater or someone spinning in an office chair.

More information: L. Kopf et al, Conservation of Angular Momentum on a Single-Photon Level, Physical Review Letters (2025). DOI: 10.1103/PhysRevLett.134.203601 Journal information: Physical Review ...

Maybe angular momentum is only conserved because I am calculating it with respect to the center of mass for the ball-spring system. OK, fine.

Conservation of angular momentum. The Principle: This can be a tough topic to tackle, so let's start with a few definitions. First we have momentum.

Recent findings confirm the conservation of orbital angular momentum in single-photon interactions, reinforcing fundamental ...

In a closed physical system, the sum of all angular momentum remains constant -- says an important physical law of conservation. Angular momentum does not necessarily need to involve "real" bodily ...

Yet all that angular momentum cannot simply be lost. It must be conserved – somewhere. Thanks to new ultrafast electron diffraction experiments, researchers at the University of Konstanz in Germany ...