red

subatomic property

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July 16, 2026

Quick Summary

In physics, "red" is associated with the longest wavelengths of visible light, approximately 620–750 nanometers. This property of light is fundamental to how we perceive color.12

In the realm of particle physics, "red" is used metaphorically as one of three "color charges" (red, blue, and green) that quarks possess. This concept, part of quantum chromodynamics (QCD), helps explain the strong force that binds quarks together. Quarks combine in specific color combinations to form color-neutral particles like protons and neutrons. This "color" is not related to visual color but is an analogy to describe fundamental properties of subatomic particles.3456

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quark
Quark colours
The colours red, green, and blue are ascribed to quarks, and their opposites, antired, antigreen, and antiblue, are ascribed to antiquarks. According to QCD, all combinations of quarks must contain mixtures of these imaginary colours that cancel out one another, with the resulting particle having no net…
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The colours red, green, and blue are ascribed to quarks, and their opposites, antired, antigreen, and antiblue, are ascribed to antiquarks. According to QCD, all combinations of quarks must contain mixtures of these imaginary colours that cancel out one another, with the resulting particle having no net…
Read More