Paraxial approximation

https://www.wikidata.org/wiki/Q1071734

Field Hierarchy

Parent
Physics 33M papers	Engineering 25M papers	Optics 8.1M papers	Structural engineering 2.6M papers
Civil engineering 854k papers		Beam (structure) 464k papers
Current
Paraxial approximation 7,394 papers
Child
Gaussian optics 421 papers

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