Geographical Range: Difference between revisions

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{{languages|Codes on Alerts and Indicators}}
{{languages|Geographical Range}}
[[Category:2.1 Optics and Vision]]
[[Category:2.1 Optics and Vision]]
[[Category:Alphabetical Index]]
[[Category:Alphabetical Index]]

Revision as of 06:48, 17 September 2026

The greatest distance at which an object or a light source can be seen under conditions of perfect visibility, as limited only by the curvature of the earth, by refraction of the atmosphere, and by the elevation of the observer and the object or light.