avalonisland888 Full Member Jun 25, 2020 #1 Advertisement - Members don't see this ad The colour of the radiation does not change nor does the medium which is why I was able to cut out B. C is just wrong based on what I know, but I don't understand how to differentiate between A and D. When does the propagation speed change?
Advertisement - Members don't see this ad The colour of the radiation does not change nor does the medium which is why I was able to cut out B. C is just wrong based on what I know, but I don't understand how to differentiate between A and D. When does the propagation speed change?
