Quantum Mechanics and the Principle of Least Time
49:11
Dark Energy and the Vacuum Catastrophe
32:44
The Strange Physics Principle That Shapes Reality
43:22
What determines the size of an atom?
26:29
How Feynman did quantum mechanics (and you should too)
24:30
The Principle of Least Action: Derivation of Newton's Second Law
23:22
What *is* a photon?
36:49
Deriving Einstein's most famous equation: Why does energy = mass x speed of light squared?
40:06