For instance, once a skater leaps into the air, they’re stuck with however much angular momentum they’ve created. But a ...

A new experiment confirms that angular momentum conservation holds even when a single photon is split into two.

A sphere moving on a smooth horizontal surface (the xy-plane) impacts a set of 13 cubes at rest on the same surface. This impacts leads to a number of subsequent impacts among these cubes. The ...

When you shine a flashlight into a glass of water, the beam bends. That simple observation, familiar since ancient times, hides one of the oldest puzzles in physics: what really happens to the ...