Mod 7 Phys time dilation (1 Viewer)

[hmim]

can someone explain why the answer is (C)?

Shouldn't the cook on the beta see a longer time as he is the observer viewing an intertial frame of reference?

Should it be (B)?

 

[ImagineDragin]

From what I know they are both in inertial frames of reference since Alpha which is travelling at 0.9c is still travelling at a constant velocity. From Alpha's frame of reference it would look like Beta is travelling at 0.9c and vice versa. Since they are both travelling in inertial frames, it should be C

 

[wizzkids]

Ha ha. This question goes right back to Einstein's two postulates of special relativity. There is no privileged inertial frame of reference in the Universe that can be considered 'stationary'. Not the Earth, not our Solar System nor any other frame of reference. All objects are in relative motion to everything else in the Universe. Both spaceships are inertial frames of reference, and the observations of the cook and the cabin boy of each other should be symmetrical and complementary. The answer is (C)

 

[hmim]

Ha ha. This question goes right back to Einstein's two postulates of special relativity. There is no privileged inertial frame of reference in the Universe that can be considered 'stationary'. Not the Earth, not our Solar System nor any other frame of reference. All objects are in relative motion to everything else in the Universe. Both spaceships are inertial frames of reference, and the observations of the cook and the cabin boy of each other should be symmetrical and complementary. The answer is (C)

Ohhh right right. Thanks so much!