1872 One day, in a hotel in California, there was a heated argument between Stanford and Cohen: did the horses all land when running? Stanford thinks that a running horse's hoof is empty at the moment of jumping; On the other hand, Cohen thinks that horses always touch the ground when running. No one could convince anyone of the result of the argument, so the usual bet method was adopted to solve it. They hired an excellent horse trainer to judge, however, it is difficult for the referee to judge who is right and who is wrong. This is normal, because it is really difficult to see how the fast-running horseshoe moves with the human eye alone.

When the referee's good friend, British photographer McBride, learned about it, he said he could give it a try. He arranged 24 cameras on one side of the runway, and their lenses were all aimed at the runway; On the other side of the runway, he ran into 24 stakes, each with a rope tied to it. These wires cross the runway and are tied to the shutter of each camera opposite.

When everything was ready, McBride brought a beautiful horse and let it run from one end of the runway to the other. When the horse ran through this area, 24 leads tripped in turn, and the shutters of 24 cameras pulled in turn, and 24 photos were taken. McBride cut these photos in order. Every two adjacent photos have little difference in action, and they form a continuous photo belt. According to this set of photos, the referee finally saw that the horse had a hoof on the ground all the time when it was running, and it would not fly, thus judging that Cohen won.

It is reasonable to say that the story should end here, but this bet and its strange judgment method have aroused great interest. Mcbride showed people a photo tape with images of galloping horses over and over again. Once, someone unconsciously pulled the photo tape quickly, and as a result, a strange scene appeared in front of him: the static horse in each photo was folded into a moving horse, and it was "alive"!

People have been enlightened from here, and since then, many inventors have turned their attention to the development of film cameras. On February 28th, 1895 1895, the French Lumiere brothers screened the film "Train Arrived" for the first time in the "Grand Cafe" in Paris, marking the official birth of the film.

Of course, the birth of the film at the end of 19 is fundamentally a comprehensive product of the combination of technology and art, and the betting incident between Stanford and Cohen, like a catalyst for the great changes in the combination of these technologies, quickly led to the emergence and production of comprehensive film technology, which opened the door to the great art of the 20th century.