- D Since the rays first reflect and then converge as they exit the box, this ray
diagram is consistent with having a plane mirror and then a converging lens
within the dotted box.
- D By Newton’s third law, the force on the heavier person is equal but opposite
to the force on the lighter person, eliminating (A) and (B).
- C When the particle enters the magnetic field, the magnetic force provides the
centripetal force to cause the particle to execute uniform circular motion.
Since v and B are the same for all the particles, the largest r is found
by maximizing the ratio m/|q|. The value of m/|q| for an alpha particle
