Preface -- Acknowledgements -- List of Abbreviations -- Chapter 1. 1900-1962. From Planck to Bohr -- Chapter 2. 1913. “On the Constitution of Atoms and Molecules”: Quantum Jumps and Epistemological Leaps -- Chapter 3. 1925. “Atomic Theory and Mechanics”: From the Old Quantum Theory to Heisenberg’s Quantum Mechanics -- Chapter 4. 1927. “The Quantum Postulate and the Recent Development of Atomic Theory” (The Como Lecture): Complementarity vs. Causality -- Chapter 5. 1929. “The Quantum of Action and the Description of Nature”: New Complementarities and a New Interpretation -- Chapter 6. 1931. “The Space-Time Continuity and Atomic Physics” (the Bristol Lecture): Quantum Phenomena and the Double-Slit Experiment -- Chapter 7. 1933. “On the Question of Measurability of Electromagnetic Field Quantities”: Complementarity and Quantum Field Theory -- Chapter 8. 1935. “Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?”: The EPR Experiment and Complementarity -- Chapter 9. 1937-1938. “Complementarity and Causality” and “The Causality Problem in Atomic Physics” (The Warsaw Lecture): The Knowable and the Unthinkable -- Chapter 10. 1954-1962. “The Unity of Knowledge”: New Harmonies -- Bibliography -- Name Index -- Subject Index.

This book offers a discussion of Niels Bohr’s conception of “complementarity,” arguably his greatest contribution to physics and philosophy. By tracing Bohr’s work from his 1913 atomic theory to the introduction and then refinement of the idea of complementarity, and by explicating different meanings of “complementarity” in Bohr and the relationships between it and Bohr’s other concepts, the book aims to offer a contained and accessible, and yet sufficiently comprehensive account of Bohr’s work on complementarity and its significance.