Image dissector

An image dissector is like a camera that can create a picture out of light. But instead of using film, it uses something called an electron beam.

You know how your TV has a picture that you see on the screen? Well, that picture comes from a bunch of tiny dots called pixels. The image dissector works kind of like that, but instead of pixels, it uses something called an "electron gun" to shoot electrons at a plate that is covered in a special kind of material called a "photoemissive layer."

When the electrons hit the photoemissive layer, they create a little flash of light. This light is then picked up by another part of the image dissector called a "photomultiplier tube." The photomultiplier tube takes this light, and turns it into an electrical signal. That signal can then be used to create a picture on a TV screen, or to record an image on some other kind of device.

So in summary, an image dissector is a special camera that uses an electron beam to create a picture out of light. It's kind of like a TV, but instead of pixels, it uses a special layer that turns electrons into light, which is then converted into an electrical signal. Cool, huh?