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The distance around the earth at the equator is 24,902 miles. Light travels in a straight line at 186,282 miles per second in a vacuum. So 24902 / 186262 is 0.13 seconds. To get a pulse of light to travel around the earth, you'd have to have a fiber-optic cable running around the earth's equator. Light travels a bit slower in optical glass than in a vacuum so it would take a pulse of light a bit longer to make one trip around the earth. In reality, light traveling in an optical fiber can't travel that far without being degraded. So the actual travel time factoring in the time the light pulse would have to be within an amplifier every sixty miles or so would slow the pulse down a bit more. Still it's a lot faster than a speeding bullet!
What else can I help you with?
How long would it take for a cheetah to circle the earth?
It would take about a month.
How long does planet Earth take to circle the Sun once?
365 days
How long would it take mercury to circle the axis?
About 523 Earth years.
How long does it take the light to travel to the earth?
It takes Light 8 Minutes to get from the Sun to the Earth.
How long does it take to go around the earth at light speed?
The circumference of the Earth is ~24902 miles or 40,076,000 meters. This speed of light is 299,792,458 m/s. So it takes 0.134 seconds to go around the earth once.
How long does it take Deimos to circle the earth?
Deimos orbits Mars, not the Earth, and takes 1.26 days to do so.
How long does it take a satellite in low earth orbit to circle the entire planet?
About an hour.
How long does it take planet neptune to circle the sun?
It takes 164.79 earth years.
How long does it take the X-43A to circle the earth 2 times?
7 hours.
How long does it take light from the earth to the moon?
About a second and a quarter.
How long does i take light to get from the sun to earth?
About 8 minutes
How long would it take the light from a star 72 light year away from earth to reach the earth?
Easy answer: it would take 72 years.
