高中物理(甲种本)第二册以导热性为例,通过实验反映了晶体的各向异性和非晶体的各向同性。教材上采用的实验方法是,用烧热的钢针的针尖接触云母片或玻璃片,在接触点周围的石蜡薄层熔化成不同图形,从而反映晶体与非晶体导热特性的差异。这一实验方法虽然比较简便,但由于石蜡薄层的固态或液态都呈透明状,要仔细观察才能看清熔化 High School Physics (A book) Volume II to thermal conductivity, for example, experimentally reflects the anisotropy of the crystal and the isotropy of the amorphous. Materials used in the experimental method is to use the tip of the hot steel needle contact mica or glass, the contact point around the thin layer of melted into different patterns of paraffin, which reflects the thermal conductivity of crystalline and amorphous differences. Although this experimental method is relatively simple, but due to the thin paraffin wax solid or liquid are transparent, to carefully observe in order to see the melting