# how fast is the speed of light in km?

how fast is the speed of light in km?

The speed of light in a vacuum is 299,792.458 km per second – just shy of a nice round 300,000km/s figure.

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How fast is the speed of light in KM?

Light from a stationary source travels at 300,000 km/sec (186,000 miles/sec).

Full answer in: www.amnh.org

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How fast is 10% the speed of light?

“These technologies are advanced,” says Davis, “but they're conventional physics and have been well-established since the dawn of the Atomic Age.” Optimistically, various propulsion systems based on fission and fusion concepts could theoretically accelerate a vessel up to 10% of the speed of light – a cool 62,000,000 ... Aug 10, 2015

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How fast is the speed of dark?

54 meters per second

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How long does it take light to travel 1 Lightyear?

For most space objects, we use light - years to describe their distance. A light - year is the distance light travels in one Earth year. One light - year is about 6 trillion miles (9 trillion km).

Full answer in: spaceplace.nasa.gov

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Why is the speed of light 300000 km s?

Light moves at the universal constant through three dimensional space because it doesn't move through time (the fourth dimension) at all. All particles move through the four dimensions of spacetime at the same velocity which is why it's called the universal constant velocity. Feb 13, 2016

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