This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
FR tyr. Building of the former experimental nuclear reactor Forschungsreaktor FR Forschungszentrum Karlsruhe with primary and secondary rainbows digital photo by Torsten Henning UTC Torsten Henning released into the public domain Karlsruhe Institute of Technology Double rainbows DrTorstenHenning
Page 2023 Free-images.com. All images are Public Domain