Students scattering 5.5 MeV {75 particles From a thin gold foil observe that 13,000 of these (1 particles are scattered at an angle greater than 45". Determine the number of a particles that are scattered between 65 and 75. 3003.4 x What is the expression for the fraction of incident particles scattered by an angle 9 or greater? Since the problem calls for a ratio, what is the only critical quantity? What is the relationship between the number of particles scattered by an angle 91 or greater, the fraction of particles scattered by an angle 92 or greater, and the number of incident particles? Knowing the number of particles scattered at angles greater than 92 and 63 where 63 > 92, how can we determine the number scattered between the angles 92 and 93? a particles