[问答题]
Show that the energya2x689yysn qw of a3n ;m0m..x k :bmpzp)uzphn p6 particle (charge $e$) in a synchrotron, in the relativistic limit ($v \approx c$), is given by $E\ (\text{in eV}) = Brc$, where $B$ is magnetic field strength and $r$ the radius of the orbit (SI units).
