image is a derivative work of the following images: File:Scale_of_justice_2.svg licensed with PD-self 2007-10-05T15:13:46Z DTR 204x208 (32656 Bytes) {{Information
optical mask based on a weighing matrix is used in the measurement of the spectrum of incoming light main subject: Weighing matrix URL: https://commons
https://creativecommons.org/licenses/by-sa/3.0CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 truetrue English Clip art of a weighing machine.