帮你认识凸透镜与凹透镜

• 作 者: 杜英杰
• 出 处: 中学生数理化(八年级物理)(配合人教社教材)
• 发表日期: 2015年11期
• 关键词: 光学元件 平行光 光折射 光心 会聚作用 移动方向 光路图 太阳光照 左向 规律总结

在我们日常生活和生产中,凸透镜和凹透镜可是有着非常多的应用.比如.同学们都喜欢看电影.电影机的核心部件之一就是凸透镜(如图1);很多同学由于不能正确使用眼睛.导致患了近视眼(如图2),这时候如果缺少了凹透镜,这些近视的同学所看到的将是一个模糊的世界.看.小小的透镜竞然能起着如此巨大的作用.那么我们如何认识它们呢?一、从透镜的形状上来认识依汉字的含义来理解.凸

In our daily life and production, there are many applications of convex lens and concave lens, for example, students like to watch movies, one of the core components of the film machine is a convex lens (Figure 1); many students can not use their eyes correctly. Resulting in myopia (Figure 2), this time if the lack of concave lens, these myopic students will see is a vague world.View small lens competition can play such a huge role.So How do we recognize them? First, understand the shape of the lens according to the meaning of Chinese characters to understand.