Suppose a beam of electrons is aimed at two slits in a slide placed in front of a screen. After a short time, the screen looks like the one at the right. a. What evidence does the picture give that electrons act like particles? b. What evidence does the picture give that electrons act like waves? C. How, if at all, would the picture on the screen change if you: decreased the spacing between the slits? Explain your reasoning. moved the screen closer to the slits? Explain your reasoning.