A ray diagram is shown.
What does O<oub>2</ouß> represent?

A. In index of reflection
B. index of refraction
C. In angle of refraction
D. angle of reflection

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