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本刊1998年第5期《介绍几个创造性实验》一文中,介绍了一个“普朗克黑体辐射”演示实验.用7只相同的白炽灯串联后,分别置于7只箱中,箱前端分别装有红、橙、黄、绿、蓝、靛、紫色的玻片(笔者注:并联也可,灯泡和玻片最好是磨砂的).在电源电压从0V逐渐增大至每只灯均达到额定电压的过程中,可以看到由红到紫的7块玻片先后依次发光,逐渐变亮.只要7色玻片现成可得,则此实验器材简单,原理浅显,操作方便,且现象生动有趣,不失为一个好实验.
In the article “Introducing Several Creative Experiments” in the 5th issue of the 1998 issue of “Introducing Several Creative Experiments”, we introduced a “planck blackbody radiation” demo experiment. After using 7 identical incandescent lamps in series, they were placed in 7 boxes, respectively. The red, orange, yellow, green, blue, enamel, and violet slides are respectively mounted (note: parallel connection is also possible; bulbs and slides are preferably frosted). The power supply voltage gradually increases from 0V to each lamp. In the course of reaching the rated voltage, it can be seen that seven slides from red to violet successively glow and gradually lighten. As long as 7 color slides are available, the experimental equipment is simple, the principle is simple, and the operation is convenient. The phenomenon is vivid and interesting. It is a good experiment.