| Here is a delightful collection of mysterious optical illusions--pictures that play tricks on the eye and baffle human perception. This book contains a rich assortment of these visual mind-bogglers, including "impossible objects"--constructions that look fine on paper but cannot possibly exist in reality--as well as pictures that suddenly change into other configurations as you're looking at them. Straight lines, for example wave and bend before your eyes; gray spots appear and disappear; patterns pulsate and vibrate, and much more. An ideal companion for long car trips, Puzzling Optical Illusions will also be a source of stimulating entertainment at parties and get-togethers or during quiet times at home and school. Paperback, 60 black-and-while illustrations, introduction, captions, 64 pages.ISBN:486401510. DOVER |
