For the next two questions, light from a laser shines on a pair of closely spaced slits and then fall on a screen. No attempt is made to detect the light until it hits the screen. When it hits the screen it produces an interference pattern, a series of bright lines.

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve