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Quantum leap - Wikipedia, the free encyclopedia

Quantum leap

From Wikipedia, the free encyclopedia

In physics, a quantum leap or quantum jump is a change of an electron from one energy state to another within an atom. It is discontinuous; the electron jumps from one energy level to another instantaneously. The phenomenon contradicts classical theories, which expect energy levels to be continuous. Quantum leaps are the sole cause of the emission of electromagnetic radiation, including that of light, which occurs in the form of quantized units called photons.

[edit] Inaccurate usage

In the vernacular, the term quantum leap has come to mean an abrupt change or "step change", especially an advance or augmentation. The term dates back to early-to-mid-20th century. The vernacular usage usually implies a large and abrupt change, while the term typically refers to a small change in quantum mechanics, often the smallest. The usages agree, however, in that both describe a change that happens all at once, rather than gradually over time. A 'quantum leap in technology' is thus a revolutionary advance, rather than an evolutionary one.

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