为什么镜子会放大事物?

克里斯-都是令人惊奇和迷人的东西。好了，是时候换换装备了，打开我们这一周的邮件袋。我们有什么，汉娜?汉娜-克里斯，我想这是问你的问题。唐·麦肯齐说:“为什么镜子会放大事物?”显然，他有一个小的手持镜子，他和他的妻子已经用了10年了，有一天，他的妻子用了它，它突然像剃须镜一样放大了。几天后，他们捡起了镜子，一切又恢复了正常。镜子放大率的变化有什么解释吗，还是说这只是他的幻觉?克里斯-不，我觉得这可能是真的。我怀疑发生了什么是镜子，这是安装在后板。 It's usually a reflective layer mounted on some kind of back plate. I suspect that probably heat or cold has caused the mirror to change its shape very subtly and it's become like those fun mirrors that you see at the fair ground. You know, the ones which are ripply shaped and they make your body have all kinds of funny proportions. Effectively, if the mirror becomes slightly curved, slightly concave, then it will have the effect of focusing the light which is coming back to you almost like a lens and the light will then begin to spread out again on its way to your eye, making what you see in the mirror look bigger than it really is. That probably happened one day and then the next day, the mirror had reverted to its normal shape again. Perhaps when it cooled down or warmed up. And that's why it went back to normal. Sound plausible to you?