A photographic plate or a piece of film so exposed.

感光胶片或底片的曝光的行为。

Some distance above the lead block a photographic plate is placed.

在铅块上方某一距离处放一照相底板。

First, a photographic plate is coated with a light-sensitive material.

首先，把一个照相底片覆盖上感光材料。

In the mass spectrograph the ions are focused onto a photographic plate.

在质谱仪中，离子聚焦在感光板上。

And we record here. And this is the blowup of what is on that photographic plate.

我们在这里记录，这是感光片所拥有的东西的放大形式。