This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionNewton rings.jpg
English: "Newton's rings" interference fringes between 2 plano convex lenses, placed together with their plane surfaces in contact. The rings are created by interference between the light reflected off the two surfaces, caused by a slight gap between them, showing that these surfaces are not precisely plane but are slightly convex.
Deutsch: Newtonsche Ringe zwischen 2 plankonvexen Linsen, die mit ihren ebenen Flächen aneinanderliegen; die Ringe zeigen, dass die Planflächen offensichtlich nicht ganz plan sind
I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
Captions
Add a one-line explanation of what this file represents
copyrighted, dedicated to the public domain by copyright holder<\/a>"}},"text\/plain":{"en":{"P6216":"copyrighted, dedicated to the public domain by copyright holder"}}}}" class="wbmi-entityview-statementsGroup wbmi-entityview-statementsGroup-P6216 oo-ui-layout oo-ui-panelLayout oo-ui-panelLayout-framed">
released into the public domain by the copyright holder<\/a>"}},"text\/plain":{"en":{"P275":"released into the public domain by the copyright holder"}}}}" class="wbmi-entityview-statementsGroup wbmi-entityview-statementsGroup-P275 oo-ui-layout oo-ui-panelLayout oo-ui-panelLayout-framed">
original creation by uploader<\/a>"}},"text\/plain":{"en":{"P7482":"original creation by uploader"}}}}" class="wbmi-entityview-statementsGroup wbmi-entityview-statementsGroup-P7482 oo-ui-layout oo-ui-panelLayout oo-ui-panelLayout-framed">
{{Information |Description={{en|1=Newton interference rings}} {{de|1=Newtonsche Ringe zwischen 2 plankonvexen Linsen; die Planflächen sind offensichtlich nicht ganz plan.}} |Source=Eigenes Werk (own work) |Author=Ulfbastel |Date=23. JU