If astronauts could travel at v = 0.95c,we on Earth would say it takes (4.2/0.95)= 4.4 years to reach Alpha Centauri,4.2 lightyears away.The astronauts disagree.How much time passes on the astronaut's clocks?
A)1.4 years
B)14.1 years
C)4.0 years
D)1.3 years
E)0.4 years

Question

If astronauts could travel at v = 0.95c,we on Earth would say it takes (4.2/0.95)= 4.4 years to reach Alpha Centauri,4.2 lightyears away.The astronauts disagree.How much time passes on the astronaut's clocks?
A)1.4 years
B)14.1 years
C)4.0 years
D)1.3 years
E)​0.4 years

Quizplus · Accepted Answer

Time dilation: t' = t / γ, where γ = 1 / sqrt(1 - v^2/c^2)t' = 4.4 years / γ = 4.4 years / sqrt(1 - 0.95^2) = 1.4 years

If Astronauts Could Travel at V = 0