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How many seconds would it take for light to travel AROUND the earth?

Science
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Question added by Salman Ahmed , Intern , Qatar Design Constorium
Date Posted: 2015/03/11
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Mohamed Khedr
by Mohamed Khedr , Researcher , Helmholtz Center Munich

Considering the radius of Earth is 6,371 km

The circumference of a cross section of earth will be2*pi*r= .59 m

And since the speed of light is about 3*10^8 m/sec

So, the number of seconds should be around (.59/3*10^8)=0.13 second

or130 millisecond!

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