A proton enters the uniform electric field produced by the two charged square plates shown below. The plates carry charges +Q and Q, where the magnitude Q = 0.2 C. The speed of the proton when it enters the region between the plates is 4 107 m/s. Figure Description Hint E a. What is the magnitude of electric field in the region? Assume that the plates are close enough together to be treated as "infinite" planes for electric field between them. x N/C. = 15.69 12.0 cm- + d= d b. What distance d has the proton been deflected downward when it leaves the region between the two plates? Assume that the electrostatic force is the only force on the charge. cm.