What Is MAGNETISM?

Описание: Discover why your refrigerator magnet is proof that the universe runs on quantum rules — and why classical physics predicts magnets shouldn't exist at all. This video explores electron spin, the Pauli exclusion principle, and the exchange interaction. Learn why the Bohr-van Leeuwen theorem says all materials should be non-magnetic, and find out why only iron, cobalt, and nickel defy this prediction. Whether you're fascinated by physics, curious about quantum mechanics, or just wondering why magnets stick to metal, this will transform how you understand the ordinary objects around you. Watch now to see magnetism the way physicists do.

📑 CHAPTERS
0:00 - Introduction
0:46 - Classical Physics Cannot Explain Magnetism
1:46 - What Is Electron Spin
2:53 - Why Everything Isn't Magnetic
4:10 - The Exchange Interaction
6:29 - Magnetic Domains Explained
7:56 - The Curie Temperature
9:00 - Why Only Iron, Cobalt, Nickel
10:31 - Quantum Mechanics Made Visible
13:07 - The History of Magnetism
15:07 - Magnetism in Modern Technology
19:32 - The Deep Truth

📚 SOURCES & FURTHER READING
Niels Bohr & Hendrika van Leeuwen – "Bohr-van Leeuwen Theorem" (1911-1919)
Wolfgang Pauli – "Pauli Exclusion Principle" (1925)
Werner Heisenberg – "Exchange Interaction" (1928)
Pierre Curie – "Magnetic Phase Transitions" (1895)
Richard Feynman – "The Feynman Lectures on Physics, Volume II" (1964)
J.H. Van Vleck – "Theory of Electric and Magnetic Susceptibilities" (1932)

#feynman #quantumphysics #magnetism #physics #quantummechanics