1 answer

A very fast space-craft with a speed of 0.60c travels to the nearby star Alpha Ventura...

Question:

A very fast space-craft with a speed of 0.60c trav

A very fast space-craft with a speed of 0.60c travels to the nearby star Alpha Ventura which is 7.5 light-years away from Earth. If the pilot turned 21 years old on the day that he left Earth, find the following: How much Earth time will have elapsed by the time that the craft arrives at Alpha Ventura? What is the biological age of the pilot when the craft arrives at Alpha Ventura?

Answers

1)

time = distance/speed

= 7.5 c.years/(0.6 c)

= 12.5 years

2)

t = t0*sqrt{1-(v/c)2}

= 12.5*sqrt{1-(0.6c/c)2}

= 10 years

age = 10 +21

= 31 years

.

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