22bf1fcb_hcards_about_CLEP_test_Nat_Sci__question
[answer] 1. motion in a straight line will have constant velocity. all other motion is judged from this frame of reference 2. The speed of light in empty space will always have the same value regardless of the motion of the source or the motion of the observer [question] 
Einstein's theory
Flashcards about CLEP test Nat Sci