The image illustrates the experimental set-up: (a) Cut-away schematic of the floating sprinkler, (b) Flow control apparatus operating in suction mode, and (c) Flow imaging with a laser sheet ...

(Nanowerk News) For decades scientists have been trying to solve Feynman’s Sprinkler Problem: How does a sprinkler running in reverse – in which the water flows into the device rather than out of it – ...