Astronaut Rachel Leaves Earth in a Spaceship at a Speed

question 60

Multiple Choice

Astronaut Rachel leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth.Rachel's destination is a star system 14.4 light-years away (one light-year is the distance light travels in one year) .According to Rachel,how long does the trip take?

• A)14 years
• B)15 years
• C)11 years
• D)4.2 years
• E)23 years