View source for File:Proton structure.svg

== Summary ==
{| class="wikitable"
|-
! Description
| <nowiki>The quark structure of the proton. There are two up quarks in it and one down quark. The strong force is mediated by gluons (wavey). The strong force has three types of charges, the so-called red, green and the blue. Note that the choice of green for the down quark is arbitrary; the "color charge" is thought of as circulating among the three quarks.</nowiki>
|-
! Source
| [https://commons.wikimedia.org/wiki/File:Quark_structure_proton.svg File:Quark structure proton.svg on Wikimedia Commons]
|-
! Author
| <nowiki>Arpad Horvath</nowiki>
|-
! Credit
| <nowiki>Own work</nowiki>
|-
! License
| [https://creativecommons.org/licenses/by-sa/2.5 <nowiki>CC BY-SA 2.5</nowiki>]
|-
! Usage terms
| <nowiki>Creative Commons Attribution-Share Alike 2.5</nowiki>
|-
! Used on
| [[Timeline of Physics]], the 1968 row (Discovery of Quarks)
|}

A byte-for-byte copy of the Commons file (SHA-1 0f4f716316e5903a8a951500930fbc46a08d9146, 1959 bytes), uploaded by tpm_timeline_images 0.1.0. It is stored here under the name the page links, File:Proton structure.svg; on Commons it is File:Quark structure proton.svg.