Why can't we see all types of waves in the electromagnetic spectrum?

Describe uniform velocity and variable velocity in short

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

Which notation is used to represent an alpha particle? a. b. c. d.