Light travels at 2.999 x 10^8 m/sec in a vacuum. calculate the distance light travels (miles) in one year.

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Griffith

Physics

2 October, 05:57

Light travels at 2.999 x 10^8 m/sec in a vacuum. calculate the distance light travels (miles) in one year.

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Mila Esparza · Answer 1

9.464x10^15 m/year First, let's calculate how many seconds there is in an year. For a year, I'll use the value of 365.25 days (to account for leap years). So we have 365.35 day/year * 24 hour/day * 60 minute/hour * 60 second/minute = 31557600 sec/year Now multiply by the speed of light. So: 31557600 sec/year * 2.999x10^8 m/sec = 9.4641242x10^15 m/year Rounding to 4 significant figures gives 9.464x10^15 m/year.