Question

Sue and Lou were conjoined (Siamese) identical twins. They had been joined at the big toe nail, so they were easily separated at birth with a pair of toe nail clippers. Years later, when they were adults, they joined the space program – Sue was an astronaut and Lou was in charge of Mission Control. In one mission, Sue traveled at 0.999c (relative to Lou) to a distant space anomaly and back. When she returned, Lou had aged 10 years.

a) How much had Sue aged?

b) According to Lou, how far had Sue traveled?

c) According to Sue, how far had Sue traveled?

Answer 1