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视觉暂留是指光刺激在视网膜上逗留的时间比它从我们眼前闪过的实际时间要稍长一点,日常生活中有许多现象就是由于人们的视觉暂留所造成的.比如一个亮点以很大的速度做圆周运动时,我们看上去就形成了一个光环.由于我们在日常生活中使用的电源为交流电,许多光源使用的也是交流电.如日光灯、台灯、电脑、电视机、电影放映机等.由于光源电压的大小随时间不断地变化,使得一些灯工作时带有明显的明暗变化的现象,这种光现象即为频闪.在频闪的光线下注视转动的电风扇,会发生电风扇倒转或不转的错误视觉现象,这种现象就是频闪效应造成的错觉,下面请看几例相关的问题.
Persistence of vision means that light stimulus stays on the retina slightly longer than the actual time it flashes before our eyes, and many phenomena in our daily life are caused by people’s persistence of vision, When we do circular motion at great speeds, we look like an aura. Because the power sources we use in our daily lives are alternating current, many light sources use alternating current, such as fluorescent lamps, desk lamps, computers, televisions and movie projectors. As the size of the light source voltage constantly changes with time, making some of the lights work with significant changes in light and dark phenomenon, this light phenomenon is the strobe. In strobe light watching rotating electric fans, fans will occur Inverted or not to the wrong visual phenomenon, this phenomenon is the illusion caused by the stroboscopic effect, the following to see a few examples of related issues.