Salutations, Canine. I am Pet Translator 1000. You are hereby requested to cease leaving dead things on the patio.
Woof bark grrrr woof woof
What'd he say?
He said, 'sniff ass, lick balls, food'
So anyway... the second observer sees the path of the light beam as being longer, but since we know the speed of light is constant then the only explanation is that time is dilated.
says: