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有人对“平面镜形成的像总是正立的”表示怀疑。认为平时我们照镜子时,镜面总是竖立的,看起来是正立的;如果把平面镜平放在地面上,直立在它上面的人形成的像就是倒立的了。
Some people are skeptical that “the image formed by a plane mirror is always erect.” We think that when we look in the mirror at all times, the mirror is always erect and appears to be erect; if we place the plane mirror flat on the ground, the image formed by the person standing upright on it is inverted.