# light (visual)

a visual state of energy that moves through space over time

- Computed level: L8 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: everyday  ·  Arena: light

## Emergence
**Emerges from:** [energy](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-energy.capacity), [space](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-space.extent), [time](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-time.dimension), [motion](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-motion.movement), [state](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-state.condition), [visual](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-visual.perceptual)

**Through:** energy, space, and time interact through motion and condition to sustain a visible pattern over time.

**Novel properties:**
- persistent visual presence
- spatiotemporal motion of energy
- observable state change

## Examples
- Sunlight travels 150 million kilometers from the Sun to Earth in about 8 minutes and 20 seconds. *(astronomy)*
- The beam of light from the 1858 Cape Hatteras Lighthouse illuminated ships up to 20 miles away at night. *(engineering)*
- Fireflies in the Great Smoky Mountains produce yellow-green light flashes during mating season in May. *(biology)*

## Used by
- [blue](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-blue.color) (L12)
- [camera](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-camera.visual) (L12)
- [fire](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-fire.combustion) (L21)
- [flash](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-flash.light) (L9)
- [screen](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-screen.visual) (L18)
- [star](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-star.celestial) (L20)
- [sun](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-sun.celestial) (L21)
- [yellow](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-yellow.color) (L22)

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