https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13989444Edit ImageSaveSaveEditCropCustom TextFabry and Perot electrical equipment: the interferometer. Photograph, 1900.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 876 px | 300 dpiLarge JPEG 3095 x 2260 px | 300 dpiFree DownloadFabry and Perot electrical equipment: the interferometer. Photograph, 1900.More