Module Menu

Module: Quantentheorie

Sequence: 0.0. Start_Quantentheorie

Branching Point: Einstein and Quantum Theory

Sequence: 1.0. Entwicklung_QT

Slide: Is Light a Wave?

Slide: Light Consists of Particles Too!

Slide: Together Wave and Particle Provide Explanations for Experiments

Slide: The Photoelectric Effect

Slide: Light quanta? Colleagues are skeptical...

Slide: Arthur Holly Compton: Photons Transfer Energy to Electrons

Slide: Louis De Broglie: Material has Wave Characteristics

Slide:

Sequence: 2.0. Objektfolge 24310

Slide: The unfinished quantum revolution

Slide: Einstein and Low-Temperature Physics

Slide: Walther Nernst (1864–1941)

Slide: Nernst's Hydrogen Liquefier

Slide: Atoms According to Democritus

Slide: Thomson's Atomic Model

Slide: Bohr's Atomic Model

Slide: The Hydrogen Atom

Slide: Einstein Meets Bohr

Slide: Fine Structure

Slide: Franck Hertz Experiment

Slide: James Franck (1882–1964)

Slide: Gustav Hertz (1887–1975)

Sequence: 3.0 BT und Objektfolge 24321

Slide: Wave and Particle as a Persistent Contradiction

Slide: Early Critique of the Light-Quantum Hypothesis

Slide: Critique of the Light-Quantum Hypothesis Continues

Slide: Too Much Speculation

Slide: X-Ray Deflection at a Crystal Lattice

Slide: Is Light Both Wave and Particle?

Slide: Einstein’s Nobel Prize

Slide: X-Ray Light Particles Bounce Off Electrons

Slide: Louis de Broglie: Recherches sur la Théorie des Quanta, Dissertation, 1924

Slide: The Diffraction of Electrons and X-Rays

Slide: Electromagnetic Lens (Cut)

Slide: Electrostatic Lens for the EM8 Electron Microscope

Slide: Cut through the Single-Field Condensing Lens and Objective with Polschuh Lens and Specimen Gate

Slide: Pole Shoe and Specimen Gate of the DEEKO 100

Slide: Stimulated Emission

Slide: A New State of Matter

Slide: Elementary Particles Follow Their Own Laws

Sequence: 4.0. Biographien

Branching Point: Biographies

Sequence: 4.1. Biographie 24321: Walther Nernst

Slide: Walther Hermann Nernst (1864–1941)

Sequence: 4.2. Biographie 24321: Arnold Sommerfeld

Slide: Arnold Sommerfeld (1868–1951)

Sequence: 4.3. Biographie 24321: Louis de Broglie

Slide: Louis-Victor de Broglie (1892–1987)

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Einstein Meets Bohr

Postcard from Einstein to Paul Ehrenfest, Berlin, 5 April 1920, reproduction

In April 1920 Bohr visits Berlin and meets Einstein personally for the first time. Einstein writes a euphoric card to Ehrenfest about Bohr, saying that he is just as in love as Ehrenfest with the highly sensitive child that wanders through the world in a kind of hypnosis.

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