过去,我们在做物体微小形变的演示实验时,是把氦氖激光器放在桌上,把激光束射到墙上,用手给桌子施加压力,通过墙上激光点的移动来说明物体的形变。最近,我们又制作了一件简易教具,只用一个玻璃墨水瓶和一个移液管就可令人信服地得出以上结论。具体做法如下:取一个扁平状、容积在600毫升以上的玻璃墨水瓶(最好 In the past, when we were doing demo experiments for small objects, we placed a helium neon laser on the table, shot the laser beam on the wall, applied pressure to the table by hand, and explained the deformation of the object through the movement of the laser spot on the wall. . Recently, we have also produced a simple teaching aid. The above conclusion can be convincingly obtained using only a glass ink bottle and a pipette. The specific approach is as follows: Take a flat, glass ink bottle with a volume of more than 600 milliliters (preferably