How does light 'know' the shortest path?
By Veritasium
Community Score: 50% | 96.0K views | 6d
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Light is the fastest thing in the universe. In order to be this fast it always needs to take the shortest path (as it's speed cannot change). So how does it always know what the shortest path is?
Tags: veritasium, science, physics, least action, lifeguard, math, quantum mechanics, Johann Bernoulli, Isaac Newton, principle of least action, quantum, problem of fastest descent, Snell’s Law, Pierre Louis Maupertuis, Fermat’s principle, Leonhard Euler, Joseph-Louis Lagrange, brachistochrone, light, electrons
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