一、影子的形成我们知道,光在同种均匀介质中沿直线传播.如果光在直线传播过程中遇到不透明的物体,将无法绕过或穿过,因此会在物体的背面光所无法到达的区域,形成一片暗区,这就是影子.炎炎夏日,出行的人们喜欢打一把遮阳伞,或者躲在树阴下乘凉,就是在利用伞影和树影.如果光源是单个发光点,那么影现象就比较简单,例如手影游戏.夜晚,点燃一支蜡烛,通过手形的巧妙变化,使手在墙壁上 First, the formation of the shadow We know that light in the same homogeneous medium along a straight line .If the light in the process of linear transmission encountered opaque objects, will not be bypassed or through, it will not be able to reach the back of the light objects Of the area, forming a dark area, this is the shadow of the hot summer, travel people like to play a parasol, or hiding under the shade of shade, is the use of umbrella shadow and tree shadow If the light source is a single luminous point, then Shadow phenomenon is relatively simple, such as hand shadow game. Night, lit a candle, hand clever changes, so that the hand on the wall