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.
Holmium spectrum visible. Holmium spectrum nm nm own McZusatz talk mathworks spectrav for Matlab by mathworks Neill Tucker was uploaded under the BSDlicence but the produced result is not copyrightable CC cc Uploaded with Up Atomic spectra Holmium
Page 2023 Free-images.com. All images are Public Domain