Planck’s constant: Quick Facts

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Facts

Also Known As	h • Planck constant

Videos

Planck length: why string theory is hard to test

Max Planck and the birth of quantum mechanics

Listen to Max Planck's light bulb experiment and the origin of quantum theory

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Topics

Planck mass Planck density Planck length electromagnetic radiation luminescence photoelectric effect photovoltaic effect gravitational constant absorption pair production resonance dielectric constant thermal radiation Auger effect

Key People

Max Planck

Max Planck

German physicist

Robert Millikan

Robert Millikan

American physicist

Italian-born physicist Dr. Enrico Fermi draws a diagram at a blackboard with mathematical equations. circa 1950.

Physics and Natural Law

Italian physicist Guglielmo Marconi at work in the wireless room of his yacht Electra, c. 1920.

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