A diagram showing water from nozzle impinging on a moving blade which deflects it by a large angle. This is the working principle of a Pelton turbine
<a href="//commons.wikimedia.org/wiki/User:Ariadacapo" title="User:Ariadacapo">Olivier Cleynen</a>
2015-03
<span class="int-own-work" lang="en">Own work</span>