Angular momentum is a fundamental quantity in physics that describes the rotational motion of objects. In quantum physics, it ...

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.

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.

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

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.

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 ...

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.

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 ...