And the ratio of the image distance to the object distance is also negative.

图像距离与 身体距离也是负数。

Let’s take a candle that's some distance from the lens, which we’ll call the object distance.

让我们拿一根离镜头有一定距离的蜡烛，我们称之为物距。

It’s the equation that relates the object distance and the image distance to the lens’s focal length.

这是将物距和像距与镜头焦距联系起来的方程式。

Let's take a candle that's some distance from the lens, which we'll call the object distance.

让我们拿一支蜡烛，把它放在远处 镜头，我们称之为体距。

It's the equation that relates the object distance and the image distance to the lens's focal length.

这是将物距 和像距与镜头焦距联系起来的方程式。

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。

The distance between the image and the lens is the image distance and is related to the object distance and the focal length by a very important equation.

像与镜头的距离是像与物的距离与焦距有关的一个很重要的方程。

We will use the object distance and the focal length of the lens to find the image distance, the location where the image forms on the other side of the lens.

我们将使用物距和镜头的焦距来找到像距，即在镜头另一侧形成图像的位置。