Special relativity, quantum mechanics, wave-particle duality, the uncertainty principle, and the revolutionary 20th-century physics that redefined our understanding of reality.
7 articles
18 min readIn 1905, a 26-year-old patent clerk named Albert Einstein published four papers that transformed physics. One of them — "On the Electrodynamics of Moving Bodies" — introduced special relativity...
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16 min readThe Sun has been shining for 4.6 billion years and will continue for another 5 billion. The energy source is not chemical — no amount of burning hydrogen gas could sustain that output for geolo...
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14 min readIn 1905, Albert Einstein published the paper that would win him the Nobel Prize — not his theory of relativity, but his explanation of the photoelectric effect. When light shines on a metal sur...
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15 min readc = 299,792,458 m/s — that number is not an approximation. Since 1983, the speed of light has been fixed by definition, and the metre is derived from it. The speed of light is the most fundamen...
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16 min readWave-particle duality is the experimental fact that quantum objects — photons, electrons, atoms — behave as waves in some experiments and as particles in others. It is not a paradox or an appro...
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14 min readIn 1927, Werner Heisenberg derived one of the most famous results in all of science: it is fundamentally impossible to simultaneously know the exact position and exact momentum of a quantum par...
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16 min readEvery atom of carbon-14 in your body is slowly decaying. Every gram of uranium in Earth's crust is undergoing spontaneous nuclear transformation. Radioactive decay is the process by which an un...
Read article →Newton's laws, kinematics, projectile motion, momentum, gravitation, and the mat…
Energy, heat, work, internal energy, the laws of thermodynamics, and the kinetic…
Transverse and longitudinal waves, wave speed, frequency, wavelength, interferen…
Electric fields, magnetic fields, circuits, Maxwell's equations, and the unified…
Displacement, velocity, acceleration, equations of motion, and the mathematical …
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