| 释义 |
实像shíxiàng物体发出的光线经凹面镜、凸透镜反射或折射后会聚而形成的影像叫做实像。实像可以显现在屏幕上,能使照相底片感光。光源在主焦点以外时才能产生实像,摄影和放映电影都必须利用实像。{real image; image formed by assembling the reflected or refracted luminous light from an object through a concave mirror or convex lens, which can be projected on a screen, and sensitize light-sensitive film. Real images can only be produced when the light source is outside the prime focus, and are indispensable to photography or the showing of a movie.} |