Beam divergence
id:
beam-divergence-270-10426066
title:
Beam divergence
text:
In electromagnetics, especially in optics, beam divergence is an angular measure of the increase in beam diameter or radius with distance from the optical aperture or antenna aperture from which the beam emerges. The term is relevant only in the "far field", away from any focus of the beam. Practically speaking, however, the far field can commence physically close to the radiating aperture, depending on aperture diameter and the operating wavelength. Beam divergence is often used to characterize
brand slug:
wiki
category slug:
encyclopedia
description:
How much a beam expands as it travels
original url:
https://en.wikipedia.org/wiki/Beam_divergence
date created:
date modified:
2023-10-24T01:26:26Z
main entity:
{"identifier":"Q1230543","url":"https://www.wikidata.org/entity/Q1230543"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/1/1a/Divergenz.Gauss-Strahl.png","width":1760,"height":600}
fields total:
13
integrity:
15