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[实验目的]1.了解游标卡尺的原理掌握其使用方法.2.用卡尺观察光的衍射现象.[实验原理]1.练习使用游标卡尺游标卡尺是利用主尺和游标尺上每一最小分隔之差,把不易直接测量的微小量通过“放大”,显示成容易测量的较大量,从而提高测量的精度.2.观察光的衍射现象利用卡尺的两外测脚形成单缝,当单缝宽度与光波波长相近时,就能观察到明显的衍射现象.
[Experimental purpose] 1. Understand the principle of vernier caliper to master its use method. 2. Observe the diffraction phenomenon of light with a caliper. [Experimental principle] 1. Practice the use of vernier caliper Vernier caliper is the use of the main ruler and vernier ruler on each minimum separation of the difference, The small amount that is not easily measured is “amplified” and displayed as a larger quantity that is easier to measure, thereby improving the measurement accuracy. 2. Observing the diffraction phenomenon of light Using the caliper’s two outer measuring feet to form a single slit, when the width and light wave of a single slit When the wavelengths are close to each other, a significant diffraction phenomenon can be observed.