Arago spot
id:
arago-spot-185-10145848
title:
Arago spot
text:
In optics, the Arago spot, Poisson spot, or Fresnel spot is a bright point that appears at the center of a circular object's shadow due to Fresnel diffraction. This spot played an important role in the discovery of the wave nature of light and is a common way to demonstrate that light behaves as a wave. The basic experimental setup requires a point source, such as an illuminated pinhole or a diverging laser beam. The dimensions of the setup must comply with the requirements for Fresnel diffracti
brand slug:
wiki
category slug:
encyclopedia
description:
Bright point that appears at the center of a circular object's shadow due to Fresnel diffraction.
original url:
https://en.wikipedia.org/wiki/Arago_spot
date created:
2002-03-17T00:10:03Z
date modified:
2024-09-07T17:28:28Z
main entity:
{"identifier":"Q1807778","url":"https://www.wikidata.org/entity/Q1807778"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/7/77/A_photograph_of_the_Arago_spot.png","width":1600,"height":1600}
fields total:
13
integrity:
16