If astronauts could travel at v = 0.90c,we on Earth would say it takes (4.2/0.90)= 4.7 years to reach Alpha Centauri,4.2 lightyears away.The astronauts disagree.How much time passes on the astronaut's clocks?
A)2.0 years
B)2.4 years
C)1.4 years
D)3.0 years

Question

Quizplus · Accepted Answer

Time dilation: t' = t / γ, where γ = 1 / sqrt(1 - v^2/c^2)t' = 4.7 years / γ = 4.7 years / 1.48 = 3.2 years

If Astronauts Could Travel at V = 0