# Light barrier

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Light_barrier
> Markdown URL: https://mediated.wiki/source/Light_barrier.md
> Source: https://en.wikipedia.org/wiki/Light_barrier
> Source revision: 1315897484
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

**Light barrier** may refer to:

- [Speed of light](/source/Speed_of_light), the upper limit for the speed at which information, matter, or energy can travel through space
- [Light curtain](/source/Light_curtain), a safety device that detects when a beam of infrared light has been broken

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Adapted from the Wikipedia article [Light barrier](https://en.wikipedia.org/wiki/Light_barrier) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Light_barrier?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.