OPTICAL ILLUSIONS
DO YOUR EYES DECEIVE YOU? Seeing is not always believing, as some people will tell yon. Tlie eyes, in fuel, ean lead a man astray In many cases. A glance at the first illustration will quite convince yon Hint the black
lines in tin* centre all curve inwards. Chech the lines with a ruler, however, and you will sec that the circles enclose a perfect square. Similarly the drawing of tlie telegraph poles indicates that the three poles differ in size. Again use your ruler, and you will see that all three
are exactly the same height. This optical illusion is brought about by the picture, but not the poles, being drawn in perspective. It appears that something is radically wrong with the oblongs shown in our last illustration, but when the ruler is again brought into use, it will
be found that both the inside and outside figures measure up accurately. After seeing these optical illusions boys and girls will be wondering just how much they can depend upon the evidence of their eyes.
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Northern Advocate, 18 October 1933, Page 4
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177OPTICAL ILLUSIONS Northern Advocate, 18 October 1933, Page 4
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