Kankakee Valley Post, Volume 1, Number 6, DeMotte, Jasper County, 1 September 1932 — Light Phenomenon [ARTICLE]

Light Phenomenon

Halation is defined as a halo of light sometimes seen around the image of a bright object in a photographic positive print. It occurs in photographs of bright incandescent lamps, strongly back-lighted objects, interior scenes including sunlit windows, or the outline of a building against a blue sky. It is a phenomenon of scattered light. It is caused by the reflection from the back of the film or plate of a certain amount of light which has passed through the sensitive coating.