Hi. A short question regarding relativity of simultaneity, its interpretation and maybe some terminology.(adsbygoogle = window.adsbygoogle || []).push({});

Suppose A and B are distant space stations, at rest with each other, clocks synchronized. A rocket R travels with high speed passing A at time t=0, heading towards B. Not going into details, from R's perspective the clock reading at B could be couple of years ahead.

If the rocket suddenly stops at A, it enters the frame of A and B, where the clocks are synchronized. After stop R will agree with A that the time at B is t=0.

Should we say that from R's perspective time went backwards at B during the deceleration? Of course R could not really watch the event because of distance and finite light speed, but nevertheless R "observed" it (in the sense commonly used in relativity, involving calculations). Or should we think this only a coordinate system change, not an observation at all?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Observing backwards time?

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**