# Feynman's reverse sprinkler puzzle solved, with broader implications

Researchers have found a solution to the classic Feynman reverse sprinkler problem, demonstrating that the reverse flow behavior also applies to "silly sprinklers." This breakthrough clarifies a long-standing physics puzzle and enhances understanding of fluid dynamics in rotating systems.

**Importance:** 3/5

## Sources

### Technology
- [Ars Technica](https://arstechnica.com/science/2026/07/solution-to-feynmans-reverse-sprinkler-puzzle-also-applies-to-silly-sprinklers/) — Mon, 13 Jul 2026 19:00:47 +0000