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:
Geometricprisms. en Maksim page en Geometric prism images Images created by Tom Ruen Tomruen date username edit summary February en User Tomruen Thousands of images have no copyright tags You can help sort this out by clicking on this link May en User Tomruen no credit May en User Tomruen no Geometric prism