Question

In 2050 preparations are underway for a manned spacecraft visit to the planetary system of the star Alpha Centauri a distance of some 4 light-years away. Provisions are placed on board to allow a trip of total duration of 16 years. Neglecting the period of acceleration, turn-around and visiting times as negligible.

a) How fast must the spacecraft travel if the provisions are to last? (leave your answer in term of c).

b) How long does the trio last, 1)as measured by an observer ib Earth? 2)as measured by the astronauts on board?

Answer 1

Time calculated in astronaut frame is comes out to be less as compared to earth' observer hence astronaut will come 2.14 years earlier( Note:- in astronaut frame)