实像,是指由实际光线或由实际光线经光学仪器反射或折射后的光线会聚而成的像,它不仅能够用眼睛看到,而且能用光屏接收到,在作图时用实线表示。而虚像是由实际光线经光学仪器反射或折射后的光线的反向延长线会聚而成的,因而它仅仅能够用眼睛看,而不能用光屏接收,在作图时用虚线表示。 A real image is an image obtained by converging actual light or light that is reflected or refracted by an optical instrument from actual light. It can be seen not only with the eyes but also with the light screen. It is represented by a solid line when drawing. . The virtual image is formed by convergence of the reversed extension line of the light reflected or refracted by the optical device by the actual light, so that it can only be seen with the eyes, and cannot be received with the light screen, and is represented by a dashed line when drawing.