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在初中物理第一册教师参考用书(华东地区初中物理教材编写协作组编)中,有关于液晶为光源的提法,我认为是错误的.光源是能够自行发光的物体.液晶的光是不是自行发射的呢?首先,我们来认识液晶的发光原理.有一些有机化合物在加热的时候,并非直接由固态变为液态,而是要经过一个或几个介于固态和液态之间的过渡状态,这种处于过渡状态的物质,其力学性质象液体,光学性质象晶体,故称为液晶.根据液晶分子的不同排列情况,液晶一般分为三种类型:(一)向列
In the junior middle school physics book reference book for teachers in the East China junior middle school physics textbook writing cooperation group, there is a reference to the liquid crystal as a light source. I think it is wrong. The light source is a self-illuminating object. The light of the liquid crystal is not The first thing to do is to understand the principle of light emission of liquid crystals. There are some organic compounds that do not directly change from solid to liquid when heated, but go through one or more transitions between solid and liquid states. This kind of substance in the transition state has mechanical properties like liquid and optical properties like crystals. It is called liquid crystal. According to the different arrangement of liquid crystal molecules, the liquid crystal is generally divided into three types: (1) Nematic