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九年义务教育教科书初中物理第一册封面正中有一彩图 ,封底又加以说明 :“水珠的作用相当于凸透镜 ,通过水珠可以看到另一侧花朵的像 ,这些像是实像还是虚像 ?”无独有偶 ,课本第六章习题 ,99页第 6题谈到 :“把一张透明塑料纸铺在桌面上 ,用筷子在塑料纸上滴一个水珠 (直径 5m
In the nine-year compulsory education textbook, there is a colorful picture in the middle of the cover of the first book of the junior middle school physics. The back cover also explains: “The effect of waterdrops is equivalent to a convex lens. You can see the flowers on the other side through waterdrops. Are these real or virtual images? ” Coincidentally, the sixth chapter of the textbook exercises, the sixth question on the 99th page said: “Put a piece of transparent plastic paper on the table and use a pair of chopsticks to drop a drop of water on a plastic sheet (diameter 5m