An upside down "rainbow" has been spotted in the sky above Essex. Rachel Sanders spotted the circumzenithal arc in Gosfield, ...

BEING, in company with a friend, Mr. Hall, on the east peak of the Berceau(3,640 ft.) on the 25th inst, a circular rainbow was visible at 2.30 P. M. upon the upper surface of light white clouds ...

When light passes through certain objects—such as prisms, rain droplets, or a CD—the different wavelengths can be bent at different angles. This makes the colors separate, so we see them as the ...