The Science of Illusions
by Jacques Ninio

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Book Reviews of The Science of Illusions

Book Review: You Can't Believe Your Eyes
Summary: 5 Stars

Ninio has indeed covered many sorts of illusions, including magic, but also such things we now take for granted as movies. It used to be that people shown a movie of a train coming at them would scurry out of its way, but we have seen enough movies by now to know that illusion for what it is. Ninio has concentrated on visual illusions because, of course, they can best be shown in a book. But also, as he points out, visual input is supreme, trusted more than other senses. People shown a film of someone saying "ga-ga" while the soundtrack says "ba-ba" will wind up hearing a hybrid "da-da" with their eyes open and "ba-ba" with their eyes closed. Everyone has had the experience of sitting in the old-style movie theater with one speaker behind the screen, and finding that the sound seemed to come from the location on the screen of whatever person or thing was shown making it. A ventriloquist, of course, easily makes visual cues of origin overcome auditory ones. The optical illusions here represent some of the old classics, as well as new ones, because new ones are being invented all the time. One of them was so strong that I believed there was a misprint when an explanation claimed that two parallelograms were the same size, so that I had to measure them, and even after that, I had to copy the page and cut the parallelograms out and compare them that way; they still do not look nearly equal. Other illusions here present obvious but invisible white shapes, or scintillating black spots that are not there, or even circuits that seem to have matter flowing around and around their printed images. This book is a wonderful funhouse.

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