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你知道吗?1.放大镜的曲面越鼓,放大倍数越大。2.放大镜的放大倍数由数字和×一起表示,例如3×。3×放大镜能将物体放大至肉眼看到的物体大小的三倍。亲自动手做一个放大镜,看一看你的放大镜能否改变物体的外观。你需要:透明塑料保鲜膜,橡皮筋,玻璃杯,水,一张报纸,铜线(或掰开的曲别针),一支铅笔。实验A咱们来做水透镜!用水和一根铜丝或掰开的曲别针做一个放大镜。第一步:把铜丝或掰开的曲别针在铅笔上绕一下,做成一个圆圈。第二步:把圆圈在水里蘸一下。第三步:用你做好的水透镜来看报纸吧。
Did you know? 1. The larger the surface of the loupe, the larger the magnification. 2. The magnification of the magnifying glass is represented by a number and ×, for example 3 ×. 3 × magnifying glass to enlarge the object to the naked eye to see the size of the object three times. Make a magnifying glass yourself and see if your magnifying glass changes the appearance of the object. You need: Clear plastic wrap, rubber band, glass, water, a newspaper, copper wire (or break apart paperclip), a pencil. Experiment A Let’s make a water lens! Make a magnifying glass with water and a copper wire or bent apart paper clip. The first step: the copper wire or broke apart in the pencil around the pencil, made of a circle. Step two: dip the circle in the water. The third step: use your water lens to read the newspaper.