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在准备新人教版八年级物理第四章第5节《光的色散》这一节课时,遇到了一个大难题:光的色散实验所需的太阳光怎样获得呢?若是用平面镜反射引入法,总会受到时间和天气的影响;若是用手电筒做实验,现象往往不明显,只得到三种颜色的光。在苦苦寻找中,查阅了很多资料,《物理教学参考》中介绍了卤钨灯丝发的光跟太阳光很接近,并且被淘汰的老式投影仪使用的灯泡正是卤钨灯丝,于是在仓库里发现了这些宝贝——多个便携式投影仪,经
In preparation for the new PEP eighth grade Physics Chapter IV, Section 5, “Dispersion of Light” This class encountered a big problem: how to obtain the sunlight required for the experiment of dispersion of light? If the plane mirror reflection introduced , Always subject to the impact of time and weather; if the experiment with a flashlight, the phenomenon is often not obvious, only three colors of light. In painstaking search, access to a lot of information, “Physics Teaching Reference” describes the halogen light is very close to the sun light, and is out of the old projector bulb is tungsten halogen lamp, so in the warehouse Found these babies - multiple portable projectors