Electrodynamics of Radiating Charges

Figure 2

The figure shows how the size of the region 𝐶, as given by (2.9), depends on the velocity of the particle. In both parts of the figure the radius 𝑟₀ of the particle is the same. The difference is that in (a) 𝛽=0.1 while in (b) 𝛽=0.6.