Protons having a kinetic energy of 5.00 MeV (1eV = 1.60×10−19 J) are moving in the positive x-direction and enter a magnetic field directed out of the plane of the page and extending from to as shown in the figure below.
(a) Find the angle α between the initial velocity vector of the proton beam and the velocity vector after the beam emerges from the field.
(b) Calculate the y component of the protons' momenta as they leave the magnetic field.
