你有没有发现过这样一种现象:把拇指和食指对着光亮处逐渐靠近,在就要挨在一起却并没有接触的时候,能看到手指间的阴影已将连接在了一起,就好像捏着一个水滴一样。这个神奇的现象被称作“黑滴效应”(Shadow blister effect)。
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