The photoplay; a psychological study (1916)

Record Details:

Title:
The photoplay; a psychological study
Date:
1916
Publisher:
New York [etc.] D. Appleton and company
Volume:
The photoplay; a psychological study
Leaf #:
00068
Language:
English
Collection:
Books
Format:
Books
Contributor:
Cornell University Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Date Added:
July 19, 2022
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DEPTH AND MOVEMENT cause, if the movement is quick, the positive afterimage of the light in its first position is still effective in our eye when the glowing point has passed through the whole circle and has reached the first position again. "We speak of this effect as a positive after- image, because it is a real continuation of the first impression and stands in contrast to the so-called negative afterimage in which the aftereffect is opposite to the original stimu- lus. In the case of a negative afterimagei the light impression leaves a dark spot, the dark impression gives a light afterimage. Black becomes white and white becomes black; in the world of colors red leaves a green and green a red afterimage, yellow a blue and blue a yellow afterimage. If we look at the crimson sinking sun and then at a white wall, we do not see red light spots but green dark spots. Compared with these negative pictures, the positive afterimages are short and they last through any notice- able time only with rather intense illumina- tion. Yet they are evidently sufficient to bridge the interval between the two slits in the stroboscopic disk or in the zootrope, the interval in which the black paper passes the 5 59