Huygens’ principle in which every point on a propagating wave acts like a point source of radiation is a foundation principle of physics. Normally, Huygens’ principle is demonstrated by passing a wave, for example a water or light wave through an aperture comparable in size to the wavelength. In this paper, an experiment is described in which a 0.1 mm diameter copper wire is placed in front of a laser pointer to demonstrate Huygens’ principle in empty space. The diffraction pattern was photographed using a phone camera, and the bandwidth measured using a free image analysis program, ImageJ. The diffraction diameter of the wire was The experiment can easily be performed in a classroom.

惠更斯原理（其中传播波上的每个点都充当点辐射源）是物理学的基本原理。通常，惠更斯原理是通过使诸如水或光波之类的波通过与波长相当的孔径来证明的。在本文中，我们描述了一个实验，其中在激光指示器的前面放置了一根直径为0.1 mm的铜线，以演示惠更斯在空白空间中的原理。使用手机相机拍摄衍射图案，并使用免费的图像分析程序ImageJ测量带宽。线材的衍射直径为。该实验可在教室中轻松进行。