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14. The nearest star, Proxima Centauri is 4.0 x 10 km away. Calculate the time it takes light signal from the earth to the star? How many years will it take a spacecraft travelling with speed of 0.0001c to reach Proxima Centauri. (c = 3 x 10 ms).​

Answer»

ANSWER:

LIGHT travels 9.46x10^12km in a year. This is the standard measure of galactic distance, the light year. So proxima is 4.244 ly away. And that is length of time a light signal would take to reach US from there, 4 YEARS and a smidgeon under three months.

Your spaceship is MOVING at 0.0001c so it will take 4.244/0.0001 years, 42,440 years.



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