In physics, an inverse-square law is any physical law stating that a specified physical quantity or strength is inversely proportional to the square of the distance from the source of that physical quantity.
The divergence of a vector field which is the resultant of radial inverse-square law fields with respect to one or more sources is everywhere proportional to the strength of the local sources, and hence zero outside sources.
Contents [hide]
1 Justification
2 Occurrences
2.1 Gravitation
2.2 Electrostatics
2.3 Light and other electromagnetic radiation
2.3.1 Example
2.4 Acoustics
2.4.1 Example
3 Field theory interpretation
4 See also
5 Notes
6 External links
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