But why do millions of arrow calculate paths of photon?| QED3

A short discussion about manipulating arrows to calculate the path of light.
In quantum Electrodynamics this actually has the grand name of Path Integral.
The theory of quantum electrodynamics elegantly includes every phenomena in the world, with the exception of gravity and nuclear phenomena.
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A series of videos about the quantum theory of light can be found here!
https://www.youtube.com/watch?v=hrLQMhqzfYE&list=PLvc1VoxNkwFHPhHIX5QAfFEnT0_Xo5ntf

Curious about the full content? Check out Feynman's book QED here:
http://cmap.systemsci.org/rid=1QS8HM93L-NRB6N9-1184/QED_The_strange_theory_of_light_and_matt.pdf

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Видео But why do millions of arrow calculate paths of photon?| QED3 канала The Theoretical Minimum