Image:Chung negative resistor.png

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This work is copyrighted and unlicensed. It does not fall into one of the blanket acceptable non-free content categories listed at Wikipedia:Non-free content#Images or Wikipedia:Non-free content#Audio clips. However, it is believed that the use of this work in the article "Negative resistance" :

To illustrate the subject in question
Where no free equivalent is available or could be created that would adequately give the same information
On the English-language Wikipedia, hosted on servers in the United States by the non-profit Wikimedia Foundation ([1]),

qualifies as fair use under United States copyright law. Any other uses of this image, on Wikipedia or elsewhere, may be copyright infringement. See Wikipedia:Non-free content and Wikipedia:Copyrights.

To the uploader: this tag is not a sufficient claim of fair use. You must also include the source of the work, all available copyright information, and a detailed non-free use rationale.

Chung's negative resistance setup

I believe this is fair use as it is for "analysis or criticism". — Omegatron 19:14, 11 November 2005 (UTC)

From [2]

{{Replaceable fair use|month=February|day=2|year=2007}} {{Replaceable fair use disputed | Needed to show as described in the paper}}

This media was proposed for deletion as a replaceable non-free content. The result was to Keep the image, as no adequate free-licensed image exists or can be created to fulfill the limited role performed by this image at the time deletion was considered. However, this image may be replaceable by free images in other contexts, and in such cases the free image must take precedence. A discussion of this decision may exist on the image talk page.

Rationale for keeping: The image is clearly fair use in the sense of being legitimately used for critical discussion (criteria 2-9). Wikipedia policy demands that, in addition to being fair use, it must also be non-replaceable (criterion 1). Technically, it is of course true that we could easily create original SVG artwork conveying the same information. However, in order to do that, the replacement artwork would have to be so close to the original that it would likely qualify as a derivative work. Hence, it would still not be "free", it would still be "only" fair use, and nothing would be gained. Fut.Perf. ☼ 14:29, 11 February 2007 (UTC)

The image deals with a contentious point of science, in which the experiment itself was probably flawed. It is important to show the experiment exactly as it was presented for purposes of criticism. — Omegatron 19:51, 11 February 2007 (UTC)