Diffraction is an important phenomenon in physics. This paper describes using a scanning electron microscope (SEM) to produce cross-sectional images of iridescent seashells. When seashell cross-sections are viewed in a SEM, regular structure is seen. Seashells are a good example of a biocomposite material and good natural objects for introducing students to composite materials.

中文翻译：

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STEM壳

衍射是物理学中的重要现象。本文介绍了使用扫描电子显微镜（SEM）产生虹彩贝壳的横截面图像。在SEM中观察贝壳的横截面时，可以看到规则的结构。贝壳是生物复合材料和很好的天然物体的典范，可以将学生介绍给复合材料。