MOVING PICTURES
Although the human eye is so useful to us, it is far from perfect in many respects. One of its imperfections is that it retains an image it sees for a comparatively long time —that is, for a large fraction of a second. Thus, if you show the eye one picture, and then another one • immediately afterwards, the-image of the first picture-remains. Moving pictures are projected at the rate of about sixteen a second. When they are shown to the eye at this rate it cannot distinguish between one picture and the next. The result is that they appear to run into one another. When the pictures of a moving object are taken at that rate and projected on a screen, they produce the appearance of movement. "The quickness of the hand deceives the eye," it is said and there is more than a grain ol truth in this.
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Bibliographic details
Evening Post, Volume CXXV, Issue 48, 26 February 1938, Page 20
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151MOVING PICTURES Evening Post, Volume CXXV, Issue 48, 26 February 1938, Page 20
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