The original subtended angle is the subtended angle of the unaided eye – the angle between the center of the objective lens and the height of the real image.

原始张角是未使用辅助工具的眼睛的张角——即物镜中心与实像高之间的角。

Because the glow persists for a little bit, if you repeat the path quickly enough, you create a solid image.

因为辉光会持续一段时间，如足够快速地重这个路径，就能形成一个实像。

If you put a piece of paper there the real image will show up and a virtual image will not.

如那里放一张纸，实像会显现出来，而虚像则不会。

The object is placed just beyond the focal point of the objective lens, so light rays again form a flipped real image on the other side.

多。 物体被放置 物镜焦点之外，因此光线再次 另一侧形成翻转的实像。

Sometimes that image is real and sometimes it is a virtual image.

有时成的是实像，有时则是虚像。

And we also know that it is going to be a real image, a true image.

我们知道这将是一个实像，一个真正的图像。

A better way to do this is actually use lenses and figure out where those objects are going to be found and the virtual or true images.

更有效的方法是利用透镜，确定物体所位置以及生成的是虚像还是实像。