Accession Number : AD0474456

Title :   EFFECT OF LUMINANCE ON THE MOON ILLUSION,

Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX

Personal Author(s) : Hamilton, James E.

Report Date : OCT 1965

Pagination or Media Count : 9

Abstract : An investigation was made to determine if the moon illusion was caused by a change in luminance or by a change in contrast with the sky background. Two moons, apparently equal in size, were projected to two different levels and at the same level in the sky. The horizon moon appeared to be larger, regardless of its luminance, when compared to an upper moon. Nearness of moon to the terrain appears to affect the apparent size of the moon more than the luminance of the moon or its contrast with the sky background. (Author)

Descriptors :   *ILLUSIONS), (*MOON, LUMINESCENCE, SPACE PERCEPTION, VISUAL PERCEPTION, BRIGHTNESS, THEORY, NIGHT SKY, TERRAIN, CLOUDS, BACKGROUND.

Subject Categories : Psychology

Distribution Statement : APPROVED FOR PUBLIC RELEASE