D. iii and iv only 20. The following particles are passed through a bubble chamber. 1. positive pion (*) li. negative beta (B) iii. gamma photon (1) iv. neutrino (v) Which of these particles will leave a track in the bubble chamber? A. iii only B. i, ii, and iv only C i and ii only D. i, ii, iii, and iv Use the following information to answer the next question A particle and its antiparticle may collide at high speeds and result in a process called annihilation where the masses produce two gamma photons and all of the conservation laws are validated. One such annihilation occurs when an electron (mass = 9.1 1 x 10-3 kg) collides with a positron (mass = 9.1 1 x 10-3 kg) to produce two photons. The reaction can be written: e tet - 2y Numerical Response #3 In the above collision two gamma photons are produced. The photons have a frequency of a.b x 10cd. The values of a, b, c, and d are and (Record all four digits of your answer on the answer sheet.) * * *