Physics

1 break

Forces, light, time and the odd behaviour of the very small.

AllBiologyComputingEarth & SpaceEconomicsEngineeringFood ScienceHistoryLanguageMathsMindMusic & SoundPhysics
Why light bends in water: the lifeguard's shortest-time path (Fermat's principle) A lifeguard runs faster than she swims, so the quickest route to a swimmer is not a straight line. It bends at the shoreline, and the bend follows one tidy… Physics4 min read