3 ms·
It wasn't clear to me from the article. Do we know the mechanism by which light is able to find the path of least time?
by mason55 9y ago
It wasn't clear to me from the article. Do we know the mechanism by which light is able to find the path of least time?
- petters 9y agoYes. It follows from the wave equation.
- tedsanders 9y agoYes. (Or at least we have a good model.) One description is that a photon takes all paths simultaneously and the paths that are not the shortest in time end up mostly cancelling out. The light's behavior is consistent with locality.
- abecedarius 9y agoYou might find Feynman's popular book QED more, erm, illuminating: https://press.princeton.edu/titles/8169.html https://press.princeton.edu/titles/8169.html