论文部分内容阅读
华师大版科学教材七年级下册第87页介绍了利用空易拉罐、半透明纸、硬卡纸制作小孔成像观察仪的方法。虽然该方法所需器材简易,但在以下几个方面存在不足:第一,较难探究像的性质与物距、像距间的关系;第二,若要观察到清晰的倒立的像,则对光源的形状、亮度有较高的要求;第三,无法探究较大孔径及小孔形状对成像性质的影响。针对以上不足,笔者对小孔成像仪进行了如下改进。
Huashi Normal Edition textbook of science, grade seven, page 87 describes the use of empty cans, translucent paper, hard cardboard production hole imaging observation method. Although the equipment required for the method is simple, it has some deficiencies in the following aspects: first, it is difficult to explore the nature of the image and the distance between objects, such as the distance between objects; second, if a clear inverted image is observed On the shape of the light source, high brightness requirements; Third, can not explore the larger aperture and the shape of the hole on the imaging properties. For the above deficiencies, I made the following improvements to the hole imager.