That’s the distance at which parallel light rays converge after passing through a converging lens.

这是平行光线通过会聚透镜后会聚的距离。

That's the distance at which parallel light rays converge after passing through a converging lens.

这是平行光线 通过会聚透镜后会聚的距离。

Any simple magnifier consists of a single converging lens, which produces a virtual image that enlarges an object.

任何简单的放大镜都由一个 会聚透镜组成，它会 产生放大物体的虚像。

But a lens that causes light rays to converge in this way is known as a converging lens.

使光线会聚的透镜称为透镜 这种方式作为长焦镜头。

For a single converging lens, the focal length and the object distance will always be positive.

对于单个会聚透镜，焦距 并且身体距离将始终为正。

When the image is upside down, like in our converging lens, then the height is a negative value.

当图像倒置时，如在长焦镜头中，其高度为负值。

And when you look through a converging lens, you can see real images from objects that are beyond the focal point.

当你透过拼贴镜头看时，你可以看到离焦点更远的物体的真实图像。

Diverging lenses have a concave shape and do the opposite of a converging lens, causing rays of light to diverge away from the lens’s axis.

发散透镜具有凹面形状，与会聚透镜相反，导致光线从透镜轴发散。

Diverging lenses have a concave shape and do the opposite of a converging lens, causing rays of light to diverge away from the lens's axis.

间隔透镜具有凹面形状并反射成组的透镜，导致光线从透镜轴散射开。

While Galileo used a concave lens for his eyepiece, the standard refracting telescope uses a convex, converging lens for both the objective lens and the eyepiece.

伽利略的目镜使用凹透镜，而标准折射望远镜的物镜和目镜都使用凸透镜。