A and B are twins. A travels at 0.6c to Alpha Centauri (which is 4 c · y from earth as measured in the reference frame of the earth) and returns immediately. Each twin sends the other a light signal every 0.01 y as measured in her own reference frame.

(a) At what rate does B receive signals as A is moving away from her?

(b) How many signals does B receive at this rate?

(c) How many total signals are received by B before A has returned?

(d) At what rate does A receive signals as B is receding from her?

(e) How many signals does A receive at this rate?

(f) How many total signals are received by A?

(g) Which twin is younger at the end of the trip, and by how many years?

Transcribed Image Text:

y:V= 0.6c -100 cmin- A' Flashbulb в