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Quantum Revolution

The Quantum Revolution is the series of discoveries between 1900 and 1930 — by Planck, Bohr, Heisenberg, Schrödinger, and Dirac — that revealed subatomic reality obeys probabilistic laws fundamentally unlike classical physics, representing the most profound transformation of scientific understanding since Newton.

Type: Event Domain: Physics Mathematics Chemistry Philosophy Era: 1900 — 1930

Overview

Energy comes in discrete quanta; particles exhibit wave behaviour; position and momentum cannot both be precisely known simultaneously; and observation irreducibly affects measured outcomes. These findings forced a fundamental revision of assumptions about determinism and causality, and the revolution transformed chemistry by showing that electron shell configurations explain chemical bonding and the entire periodic table.

Why it matters

Quantum mechanics is the foundation for semiconductors, lasers, MRI imaging, and quantum computers — technologies that collectively define modern civilisation and have shaped engineering for eighty years. It also generated ongoing, unresolved debates in philosophy of science about the interpretation of physical reality.

What it builds on

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