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一、凸透镜成像问题知多少1.当物体距凸透镜远远大于二倍焦距时,这时物体的像成在凸透镜另一侧的焦点上,如将凸透镜正对太阳光,适当调节凸透镜与光屏之间的距离,就会在光屏上得到一个极小的亮点,这个点就是太阳的实像,也是凸透镜的焦点。这个点到凸透镜的中心距离就是该凸透镜的焦距。若将光屏换成纸,这点很快被烧焦。
First, the convex lens imaging problem to know how much 1. When the object is far greater than two times the focal length from the convex lens, then the image of the object in the focus of the convex lens on the other side, such as the convex lens is facing the sun, properly adjust the convex lens and light screen The distance between them will get a tiny bright spot on the screen. This point is the real image of the sun and the focal point of the convex lens. The distance from this point to the center of the convex lens is the focal length of the convex lens. If you replace the screen with paper, this will soon be scorched.