本课件为“凹透镜成像”的动画演示,通过拖动燃烧的蜡烛,改变物距,演示物体通过凹透镜所成的像,帮助学生理解凹透镜成像的特点及规律,其制作过程为:一、设置文件属性新建一个Flash文件,设置文件属性,动画的尺寸(640×480像素),背景颜色(蓝白渐变填充 This courseware is an animated demonstration of “concave lens imaging”, which helps students to understand the characteristics and rules of concave lens imaging by dragging the burning candle, changing the object distance and demonstrating the image formed by the object through the concave lens. The production process is as follows: Set the file properties Create a new Flash file, set the file properties, animation size (640 × 480 pixels), background color (blue and white gradient fill