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.
Keywords from Image Description:
Solar AM spectrum with visible spectrum background no. en Solar AM Air Mass Zero spectrum Chris Gueymard as included in nrel gov SMARTS together with blackbody spectrum for kelvin and solid angle steradian for the source the solar disk The visible region of the electromagnetic spectrum is shown using the CIE visible spectrum