论文部分内容阅读
初一生物课本上有这样一道探究题:将鼻子对着图1的中间,将眼慢慢靠近图形,你会看到什么现象?为什么? 同学们做一做该实验便知道:老虎会慢慢走进了房子里。为什么呢? 要回答这个问题,我们必须明确眼睛的成像原理:人的眼睛其实是“肉做的凸透镜”,它相当于一架照相机,当物距大于两倍焦距时,成倒立缩小的实像。凸透镜成像是用光屏来承接的,而眼睛成像是由视网膜来承接的。正常人的眼睛
There is such an inquiry question in the first-year biology textbook: Put your nose in the middle of Figure 1, and slowly move your eyes closer to the graph. What do you see and why? The students will do this experiment and they will know that the tiger will slowly Into the house. Why? To answer this question, we must clarify the imaging principle of the eye: the human eye is actually a “convex lens made of meat.” It is equivalent to a camera. When the object distance is greater than twice the focal length, it becomes an inverted real image. Convex lens imaging is performed with a light screen, and eye imaging is performed by the retina. Normal eyes