Art Principle: Movement & Rhythm
Op Art is short for 'optical art'. The word optical is used to describe things that relate to how we see. Have you seen an optical Illusion before? Op art works in a similar way. Artists use shapes, colours and patterns in special ways to create images that look as if they are moving or blurring.
https://www.tate.org.uk/kids/explore/what-is/op-art
https://www.tate.org.uk/kids/explore/what-is/op-art