Visual illusions, their causes, characteristics and applications (1922)
Luckiesh, Matthew, 1883- · New York, Van Nostrand · leaf 185
172 VISUAL ILLUSIONS made without otherwise adjusting the camera. Again no enlargement at the horizon was found. Although the foregoing is conclusive evidence of the illusory character of the enlargement there are other ways of making measurements. On viewing … Fig. 79. — Accurate tracings from a photograph (short exposures at intervals) of the sun setting. the sun at the horizon a bright after-image is ob- tained. This may now be projected upon the sky as a background at any desired altitude. It will ap- pear much smaller at the zenith than the sun…
Optical illusions
Internet Archive · Gerstein - University of Toronto · Public domain (published before 1931). Free to use for anything.
