Consider the Same Scenario as in the Previous Problem: Two

question 4

Multiple Choice

Consider the same scenario as in the previous problem: Two twin sisters,Gwen and Jackie,are both 20 years old in the year 2020.Jackie takes off on a round-trip to Vega,25 light-years away.She travels at an average speed of 0.9999c.Which of the following best describes the situation according to Jackie?

• A)She stays still,while Earth rushes away from her at 0.9999c and Vega rushes toward her at 0.9999c.Since Vega is 25 light-years away,she says it takes Vega about 25 years to reach her.
• B)She says that the 25 light-year trip takes only a few months,and therefore concludes that she is traveling faster than the speed of light.
• C)It takes her 25 years to reach Vega.
• D)She stays still,while Earth rushes away from her at 0.9999c and Vega rushes toward her at 0.9999c.She sees the distance from Earth to Vega shortened considerably from 25 light-years,and therefore it takes far less than 25 years for Vega to reach her.