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2. Method of image charges - Wikipedia

   en.wikipedia.org/wiki/Method_of_image_charges

   Method of image charges. The method of image charges (also known as the method of images and method of mirror charges) is a basic problem-solving tool in electrostatics. The name originates from the replacement of certain elements in the original layout with fictitious charges, which replicates the boundary conditions of the problem (see ...

3. Wikipedia:Image use policy - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:Image_use_policy

   In general, if the image cannot be reused (including with redistribution and modification rights) by any entity, including commercial users, then the image must be considered non-free. Use of copyrighted material under an invalid claim of a non-free rationale constitutes copyright infringement and is illegal.

4. freeImages - Wikipedia

   en.wikipedia.org/wiki/FreeImages

   The site was launched in February 2001 by Peter Hamza, and allows users to contribute, share and download high-resolution photographs and illustrations free of charge. Contributors are encouraged to submit material to enhance their photography career through wider public exposure. In 2009, the site had over 2,500,000 registered users (1,000,000 ...

5. Creative Commons - Wikipedia

   en.wikipedia.org/wiki/Creative_Commons

   The organization has released several copyright licenses, known as Creative Commons licenses, free of charge to the public. These licenses allow authors of creative works to communicate which rights they reserve and which rights they waive for the benefit of recipients or other creators. An easy-to-understand one-page explanation of rights ...

6. Public domain - Wikipedia

   en.wikipedia.org/wiki/Public_domain

   A public-domain book is a book with no copyright, a book that was created without a license, or a book where its copyrights expired [ 17] or have been forfeited. [clarification needed][ 18] In most countries the term of protection of copyright expires on the first day of January, 70 years after the death of the latest living author.

7. Royalty-free - Wikipedia

   en.wikipedia.org/wiki/Royalty-free

   In photography and the illustration industry, it refers to a copyright license where the user has the right to use the picture without many restrictions to the licensor. The user can therefore use the image in several projects without having to purchase any additional licenses. RF licenses can not be given on an exclusive basis.

8. Creative Commons license - Wikipedia

   en.wikipedia.org/wiki/Creative_Commons_license

   The author, or the licensor in case the author did a contractual transfer of rights, needs to have the exclusive rights on the work. If the work has already been published under a public license, it can be uploaded by any third party, once more on another platform, by using a compatible license, and making reference and attribution to the original license (e.g. by referring to the URL of the ...

9. Wikipedia:Reusing Wikipedia content - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:Reusing...

   From the information page, to download an individual free image, first right-click "Full resolution‎" or the linked name of the image. Next, choose to save the image (exact option depends on browser). A brief overview of some of the licenses that may be applied to media on Wikipedia is visible at Wikipedia:Image copyright tags.