Speed of Light: How Fast Is Light and How Was It Measured?
The speed of light is exactly 299,792,458 m/s. Learn how it was measured, how fast light travels in water and glass, and why nothing can go faster.
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Modern Physics Explained: Relativity, Quantum Theory and Nuclear Physics
Modern physics explained simply: special relativity, E = mc², photons, the photoelectric effect, wave–particle duality, the Bohr model and half-life.
