Visual illusions, their causes, characteristics and applications (1922)
Luckiesh, Matthew, b. 1883 · New York, D. Van Nostrand company · leaf 160
LIGHTING 145 of objects and they indicate the importance of correct assumptions in arriving at a correct judgment. In these cases the concealment of the light-source and the commonness of bas-relief as compared with … a h Fig. 74. — a. A disk (above) and a sphere (below) lighted from overhead. b. A disk and a sphere lighted by perfectly diffused light. intaglio are the causes for the illusion or the error in judgment. Certainly in these cases the visual sense delivers its data correctly. In Fig. 74 the upper…
Optical illusions
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