Uniform electric and magnetic fields with strength E and induction B respectively are directed along the y axis (Fig. 3.101). A particle with specific charge On leaves the origin O in the direction of the x axis with an initial non-relativistic velocity v0. Find:
(a) the coordinate yn of the particle when it crosses the y axis for the nth time;
(b) the angle α between the particle'* velocity vector and the y axis at that moment.
