This optical illusion, called the wagon wheel effect, also can occur in the presence of a strobelight.
这个错觉,被称为“马车轮效应”,也可能发生在有闪光灯的情况下。
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Flash or strobelight lets you photograph in dark places without having to increase your camera's ISO setting or use a tripod, as long as the subject is within the range of your light.