Physics

Question

If the star alpha centauri, 4.37 light-years distant from the earth, were to explode this instant, when would we be aware of this event?

1 Answer

  • A light year is a unit for length that is used for very great distances. This is approximately equal to 9.4607 x 10^12 km. Multiplying this distance to 4.37 will give us an answer of 4.134 x 10^13 km. Dividing this by the speed of light, 3 x 10^8 m/s will give us an answer of,
                                      137810863.3 s 
    Also equal to 4.37 years. 
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