File:Jan-czochralski.jpg Knowpia

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English: Polish chemist, Jan Czochralski (1885-1953) Polish: Opisz sylwetke Jana Czochralskiego

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https://brainly.pl/zadanie/5016281; http://pl.static.z-dn.net/files/df7/a0af94c2427877fd038617e62ad201e6.jpg

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This image is in the public domain because under the Copyright law of the United States, originality of expression is necessary for copyright protection, and a mere photograph of an out-of-copyright two-dimensional work may not be protected under American copyright law. The official position of the Wikimedia Foundation is that all reproductions of public domain works should be considered to be in the public domain regardless of their country of origin (even in countries where mere labor is enough to make a reproduction eligible for protection).

This image is in the public domain in the United States. In most cases, this means that it was first published prior to January 1, 1929 (see the template documentation for more cases). Other jurisdictions may have other rules, and this image might not be in the public domain outside the United States. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.