• Illustration by Edmond H. Thall, MD.
    File Size: 595 KB
    Refractive Mgmt/Intervention

    The electromagnetic (EM) spectrum. The spectrum is divided for practicality into regions in which the radiation is generated and detected by similar techniques and equipment; thus, various EM regions partially overlap. Notice the relatively small visible portion of the EM spectrum (red bar) compared with other portions.