一、选择题( 气 关于凸透镜 去正确的是 A凸透镜对平行光才有会聚作用 B.平行光经凸透镜会聚的一点叫焦点 C.经过焦点的 透镜折射后,平行主光轴射出 2.下列关于实像和虚像的说法,正确的是 A.实像能成在屏上,虚像则不能 B.虚像是人的幻觉,并没有光线射人人眼 C.实像都是由光的折 First, the multiple-choice questions (Gas related to the convex lens to the correct is A convex lens for convergence of parallel light B. parallel light through the convex lens convergence point called focus C. after the focus of the lens refraction, parallel to the main axis output 2. The following The real image and the virtual image are correct. A. The real image can be on the screen, and the virtual image can’t be B. The virtual image is the illusion of human beings. There is no light that can shoot people’s eyes. C. The real images are all folded by light.