Article snapshot taken from[REDACTED] with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
This is a faithful photographic reproduction of a two-dimensional, public domain work of art. The work of art itself is in the public domain for the following reason:
Public domainPublic domainfalsefalse
This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.
You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
The official position taken by the Wikimedia Foundation is that "faithful reproductions of two-dimensional public domain works of art are public domain". This photographic reproduction is therefore also considered to be in the public domain in the United States. In other jurisdictions, re-use of this content may be restricted; see Reuse of PD-Art photographs for details.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
ISO speed<\/a>"}},"text\/plain":{"en":{"":"ISO speed"}}},"{\"value\":{\"amount\":\"+100\",\"unit\":\"1\"},\"type\":\"quantity\"}":{"text\/html":{"en":{"P6789":"100"}},"text\/plain":{"en":{"P6789":"100"}}}}">
media type<\/a>"}},"text\/plain":{"en":{"":"media type"}}},"{\"value\":\"image\\\/jpeg\",\"type\":\"string\"}":{"text\/html":{"en":{"P1163":"image\/jpeg"}},"text\/plain":{"en":{"P1163":"image\/jpeg"}}}}">
main subject<\/a>"}},"text\/plain":{"en":{"":"main subject"}}},"{\"value\":{\"entity-type\":\"item\",\"numeric-id\":115858229,\"id\":\"Q115858229\"},\"type\":\"wikibase-entityid\"}":{"text\/html":{"en":{"P921":"The Wave<\/a>"}},"text\/plain":{"en":{"P921":"The Wave"}}}}">
Size of this preview: 800 × 461 pixels. Other resolutions: 320 × 184 pixels | 640 × 369 pixels | 1,024 × 590 pixels | 1,280 × 737 pixels | 2,560 × 1,474 pixels | 3,957 × 2,279 pixels.
.jpg)
You must also include a 
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.