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根据初中物理教学的要求,结合学校现有的配套仪器,我们研制了这种白光的色散与合成演示器,经试用收到了良好的效果.现简介如下,供参考.一、简要的实验分析一束白光射入棱镜后产生的色散现象实质上是一种媒质对另一种媒质的折射率随着光的波长而变化的结果.而且,由于白光通过棱镜时,这种折射过程进行了两次,色散得到加强,现象十分明显,如图1所示.由折射定律(sin i)/(sin r)=n_(21)不难得出,不同波长的
According to the requirements of junior high school physics teaching, combined with the school’s existing supporting equipment, we developed this dispersion and synthesis demonstrator of white light. After trial, it has received good results. Now it is briefly introduced as a reference. First, a brief experimental analysis The dispersion phenomenon caused by the injection of white light into the prism is essentially a result of the refractive index of the medium changing with the wavelength of the light of another medium. Moreover, since the white light passes through the prism, this refraction process is performed twice. The dispersion is strengthened and the phenomenon is very obvious, as shown in Figure 1. It is not difficult to draw from the law of refraction (sin i)/(sin r)=n_(21), different wavelengths