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A drawing of an aeroplane with motion lines to indicate that it is moving fast
Motion lines in a Japanese
motion lines (also known as movement lines, action lines, speed lines or  zip ribbons) are the abstract lines that appear behind a moving object or person, parallel to its direction of movement, to make it appear as if it is moving quickly.
The use of motion lines in art is similar to the lines showing
mathematical vectors, which are used to indicate direction and force. A similar effect is found in long-exposure photography, where a camera can capture lights as they move through time and space, blurred along the direction of motion. They are highly predominant in Japanese manga.
Motion lines added with photo-editing software, to imply motion
Carmine Infantino was one of the best known practitioners of motion lines, particularly in his illustration of Silver Age Flash comics.   
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