https://youtu.be/qJZ1Ez28C-A
Reposted from the YouTube video above:
Something Strange Happens When You Trust Quantum Mechanics
Does light take all possible paths at the same time?
0:00 What path does light travel?
2:40 Black Body Radiation
6:47 How did Planck solve the ultraviolet catastrophe?
9:42 The Quantum of Action
13:25 De Broglie’s Hypothesis
15:16 The Double Slit Experiment
20:00 How Feynman Did Quantum Mechanics
25:01 Proof That Light Takes Every Path
31:16 The Theory of Everything