How would the electric field look like for an electron gun?

[chroncile]

Homework Statement

Sketch to illustrate the device and the role of the electric field for
- an electron gun

Homework Equations

N/A

The Attempt at a Solution

http://i.imgur.com/J8Diu.png

 

[uub3r]

The herp. I mean the answer is derp.

 

[uub3r]

http://tinypic.com/r/xnb0qd/7

http://tinypic.com/r/xnb0qd/7