Many rainbows exist; however, only one can be seen depending on the particular observer's viewpoint as droplets of light illuminated by the sun. S2CID CiteSeerX Archived from the original on 2 October The full spectrum is present, however, but the human eye is not normally sensitive enough to see the colours. Rainbow Information Gif The rainbow bridge: rainbows in art, myth, and science. As human visual perception for colour is poor Rianbow low light, moonbows are often perceived to be white. Read about Marc Getter Gfi view his wonderful paintings.