なんだかよくわからないが これがJohn Denker が描いた電磁ポテンシャルらしい。
Figure 6: Electric Field Lines for an Accelerated Charge
This is vaguely reminiscent of the sacred I’itoi symbol (The Man in the Maze).
The green dot marks the center of the world, in the lab frame.
Figure 6 does not represent a particle that moved from the red point to the blue point. The diagram is a snapshot taken at the present time (t=1). There is nothing at the red point; it is where the particle hypothetically would have been if it hadn’t bounced.
The shell that divides the inner and outer parts of the diagram is shown in green. It is centered in the lab frame, i.e. centered in the lab frame. The shell is thin because the bounce was rather sudden and impulsive. It occurred over a short time Δt.
As