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——即物镜中心与高度之间的角度。

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

因为辉光会持续间，如果你足够快速地重这个路径，就能形成个。

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

如果你在那里放张纸，会显现出来，而虚则不会。

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 在物镜焦点之外，因此光线再次 在另侧形成翻转的。

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

有成的是，有则是虚。

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

我们知道这将是个，个真正的图。

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，确定物体所在位置以及生成的是虚还是。