镜中时钟问题是初中光学常见且典型的应用问题.解答这类问题的关键是要正确理解平面镜成像的特点,并灵活加以运用.下面举例来讨论一下解答这类问题的方法. 例某时钟的镜面上无数字,只有刻度线,图1是从平面镜里看到的时钟镜面,求该时刻的实际钟点数是多少. 解法一 The clock problem in the mirror is a common and typical application problem in junior high school optics. The key to solving this type of problem is to correctly understand the characteristics of the planar mirror imaging and use it flexibly. The following examples are used to discuss ways to solve such problems. Example A clock There is no number on the mirror, only the tick mark, Figure 1 is the clock mirror seen from the plane mirror, how much is the actual number of clocks at this moment? Solution one