299 792.458 km s-1.
This is not an approximate figure - it is exactly right by definition.
If there was a tiny error it will be corrected by adjusting the meter !
The speed of light in a vacuum is 186,282.397 miles per second or 670,616,629.2 miles per hour.
The speed of light is not limited in a vacuum - the speed of light is fastest in a vacuum. But that is what Einstein called the "Cosmic Speed Limit" - nothing can move faster than the speed of light in a vacuum, or even quite asfast.
Light travels at approximately 299,792 kilometers per second in a vacuum. To find out how many nanoseconds it takes light to travel 3.50 meters, we can use the formula: time = distance / speed. Converting 3.50 meters to kilometers gives 0.0035 kilometers, and then calculating the time gives about 11.6 nanoseconds. Thus, it takes light approximately 11.6 nanoseconds to travel 3.50 meters.
About 2/3 its speed in a vacuum.
The speed of light is 186,000 miles per second in a vacuum.
The speed of light in a vacuum is approximately 299,792 kilometers per second.
Speed of light is a constant factor. It is approximately 188,000 miles per second.
Light travels at 299,792.211 km per second in a vacuum.
Light is a type of wave; it is not a type of speed.
The speed of light in a vacuum is approximately 299,792 kilometers per second.
Light of different colors in a vacuum all travel at the same speed, which is approximately 299,792 kilometers per second.
The speed of light is 2.997925 x 108m/s, so 2.997925 x 105km/s
The speed of light is equal to 1 unit of c, where c is the speed of light in a vacuum, approximately 299,792 kilometers per second.
The fastest possible speed that an object can travel in a vacuum is the speed of light, which is approximately 299,792 kilometers per second.
All electromagnetic waves travel at the same speed in vacuum.
All colors of light travel at the speed of light in a vacuum, which is approximately 299,792 kilometers per second (186,282 miles per second). This speed is a constant in a vacuum for all wavelengths of light.
The speed of a gamma particle is approximately the speed of light, which is around 299,792 kilometers per second in a vacuum.