File:Portrait of John Ashworth Ratcliffe FRS.jpg

Licensing
=== Fair use for J. A. Ratcliffe === Though this image is subject to copyright, its use is covered by the U.S. fair use laws, and the stricter requirements of Wikipedia's non-free content policies, because:
 * 1) It is a historically significant photo of a famous British physicist.
 * 2) It is of much lower resolution than the original. Copies made from it will be of inferior quality.
 * 3) The photo is only being used for informational purposes.
 * 4) Its inclusion in the article adds significantly to the article because the photo brings character to the words.