If the index of refraction for a certain glass is 1.5, and the angle of refraction is 15 degrees for a ray of light traveling from air (index of 1) what is the angle of incidence? (in coming beam)
Round your answer to the nearest tenth of a digit. The answer is in degrees so don't worry about the units

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

What are chlorofluorocarbons and what impact do they have on the atmosphere?

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