Question 886921: Given that the speed of light in vacuum is 3.00×108m/s, how many seconds does it take light to travel a distance of 2.60km ? Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! Given that the speed of light in vacuum is 3.00×108m/s, how many seconds does it take light to travel a distance of 2.60km ?
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Use ^ (Shift 6) for exponents.
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d = r*t
r = 3*10^8 = 3e8 m/sec = 3e5 km/sec
t = d/r
t = 2.6/3e5 = 0.8666e-5 sec
t = 8.666e-6 or 8.666*10^-6 sec
t = 8.666 microseconds
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The format 3e8 is commonly used in programming and math.
It's much easier to type.
