How Planck Accidentally Created Quantum Mechanics

At the end of the 19th century, physicists believed they had almost finished understanding the universe.
Newton’s laws worked. Maxwell’s equations explained light. Thermodynamics explained heat. Science looked complete.
Then a glowing stove broke everything.
In this video, we explore the discovery of Planck’s constant — the tiny number that forced physics into an entirely new reality and accidentally created quantum mechanics.
The problem began with blackbody radiation: why hot objects glow different colors as they heat up. Classical physics predicted something impossible — infinite energy at high frequencies. A disaster known as the ultraviolet catastrophe.
To solve it, Max Planck made a desperate mathematical assumption:
What if energy does not flow continuously?
What if nature only allows energy in tiny discrete packets — quanta?
That single idea changed science forever.
We break down:
• Why classical physics failed
• The ultraviolet catastrophe explained
• How blackbody radiation works
• Why Planck introduced quantized energy
• The meaning of Planck’s constant
• How Einstein turned Planck’s math into reality
• Why quantum mechanics shattered determinism
• The strange transition from a smooth universe to a granular one
• How this discovery led to modern chemistry, electronics, lasers, and computers
This is the story of the moment humanity realized reality itself is quantized.
Not smooth.
Not continuous.
But built from tiny indivisible steps hidden beneath the surface of the world.
Link:-
Max Planck Biography – Nobel Prize
What Is Planck’s Constant? – Britannica
Blackbody Radiation Explained – HyperPhysics
The Ultraviolet Catastrophe – Khan Academy
Planck’s Quantum Hypothesis – Stanford Encyclopedia of Philosophy
Quantum Mechanics and Planck’s Discovery – PBS Space Time
Einstein and the Photoelectric Effect – Nobel Prize
Planck’s Law Interactive Explanation – PhET Colorado
The History of Quantum Mechanics – American Physical Society
MIT Quantum Physics Notes

Видео How Planck Accidentally Created Quantum Mechanics канала Think Like Feynman