# red (color)

a color that differs from other colors because of its energy

- Computed level: L9 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: everyday  ·  Arena: visual perception

## Emergence
**Emerges from:** [color](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-color.visual), [energy](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-energy.capacity), [difference](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-difference.relation)

**Through:** energy together with color creates a distinction based on energetic properties

**Novel properties:**
- distinctive hue
- perceptual contrast
- energetic differentiation

## Examples
- A laser pointer emits red light at 650 nanometers wavelength due to electron transitions in gallium arsenide. *(physics)*
- The red berries of the autumn olive (Elaeagnus umbellata) attract birds more than green or yellow fruits. *(biology)*
- The 1971 Pioneer 10 spacecraft used a red filter in its imaging photopolarimeter to map planetary surfaces. *(engineering)*

## Used by
- [brown](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-brown.color) (L13)

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-red.color*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-red.color.json*  
*Every definition provably resolves to space, time, energy and pattern.*