An introduction to the study of colour vision (1915)
Parsons, John Herbert, Sir, 1868-1957 · Cambridge [Eng.] : University Press; New York, G.P. Putnam's Sons · leaf 102
ial slit in a rotating disc the image is spread out into a sector, varying in width according to the rapidity of rotation. This is due to the per- sistency of the sensation beyond the time of stimulation. The sector is not of uniform brightness, but is marked with alternate light and dark bands… … Fig. 36. Diagram illustrating the primary response to a single momentary stimulus. The series of pulses of sensation commences at a and lasts through a period of about f sec., represented by a — i. The height to which each curve rises represents the intensity ^of the pulse of sensation. The effects…
Color vision
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