用身边的事例去解释和总结物理规律,学生听起来熟悉,接受起来更容易。原本人眼看物体是一件很自然的事情,但是在学习过透镜以后你思考过没有:人眼为什么能看到虚像?所谓虚像,就是光屏接收不到的像。人眼看物体时,在视网膜上能成一个倒立、缩小的实像。包括光屏上接收不到的像,也能成在视网膜上,那为什么虚像不能成在光屏上,而把视网膜当成光屏时,就能成实像了呢?原来,人眼看东西时,不只是由视网膜在起作用,不可忽视的 Explain and summarize the laws of physics with the examples around them, and the students sound familiar and easier to accept. The original view of the object is a very natural thing, but after you studied the lens you have not thought: why the human eye can see the virtual image? The so-called virtual image, is the screen can not receive the image. When people see the object, the retina can become an inverted, reduced real image. Including the screen can not receive the image, but also into the retina, then why the virtual image can not be on the screen, and the retina as a light screen, can become a real image of the original, the human eye to see things, not just by Retina at work, can not be ignored