1865Rudolf Clausius Defines Entropy

Rudolf Clausius: Definition of entropy.
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Year
1843
1865
1877
1888
1906
1912

💡 Joule's Presentation on the Conservation of Energy

Joule's Presentation on the Conservation of Energy (1843)
PhysicsThermodynamicsEnergyScientific Revolution
United KingdomUnited Kingdom

🌡️ Rudolf Clausius Defines Entropy

Rudolf Clausius: Definition of entropy.
Rudolf Clausius Defines Entropy (1865)
ThermodynamicsPhysicsEnergyScientific Revolution
GermanyGermany

⚛️ Boltzmann Defines Entropy Statistically

Ludwig Boltzmann: Statistical definition of entropy.
Boltzmann Defines Entropy Statistically (1877)
PhysicsThermodynamicsScientific RevolutionEnergyTheoretical Physics
AustriaAustria

📡 Hertz Demonstrates Radio Waves, Validating Maxwell's Electromagnetic Theory

Heinrich Hertz publishes a conclusive proof of James Clerk Maxwell's electromagnetic theory in experiments that also demonstrate the existence of radio waves. The effects of electromagnetic waves had been observed by many people before this but no usable theory explaining them existed until Maxwell.
Hertz Demonstrates Radio Waves, Validating Maxwell's Electromagnetic Theory (1888)
PhysicsElectromagnetismScientific RevolutionCommunicationGlobal Impact
GermanyGermany

⚛️ Walther Nernst Formulates the Third Law of Thermodynamics

Walther Nernst Formulates the Third Law of Thermodynamics (1906)
PhysicsThermodynamicsChemistryPhysical ChemistryGerman Science
GermanyGermany

⚛️ Max von Laue Discovers X-ray Diffraction

Max von Laue Discovers X-ray Diffraction (1912)
PhysicsQuantum MechanicsScientific Revolution
GermanyGermany