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光学演示实验是物理教学中较难完成好的实验,一般要在暗室中进行,否则很难清楚地演示出光路。使用激光器以后,实验可在一般教室内完成,但激光光束较窄,要将显示光路的光屏与光束调整在同一平面内较为费事。为此,我们利用了光在胶体溶液中的丁德尔散射,将激光射在胶体溶液中,演示各种实验,这样不用调平面,光路能极清楚地显示出来,下面以初三教材为例简单说明一下。
The optical demonstration experiment is a difficult experiment in physics teaching. It is usually performed in a dark room, otherwise it is difficult to clearly demonstrate the light path. After using the laser, the experiment can be completed in a common classroom, but the laser beam is narrow, and it is more troublesome to adjust the screen of the display optical path and the beam in the same plane. For this purpose, we use the Dynar scattering of light in a colloidal solution and shoot the laser in a colloidal solution to demonstrate various experiments so that the light path can be clearly displayed without adjusting the plane. Explain.