Darkness is not an entity, so it does not travel and has no speed. In principle, a shadow or nonentity could "travel" faster than the speed of light. For example, if you pivoted a powerful laser a few degrees the point of light would travel across a screen very far away at a "speed" greater than light. Note that this is not at all faster than light motion. You could achieve a similar effect by casting shadows on things very far away. But none of this is actually a "speed."
299792.458 is a number. You cannot use merely a number to talk about speed, it is utterly meaningless. Speed is distance per time. This could be metres/second or kilometres/hour or miles/hour or feet/minute. You may think this is silly. But your answer might be right in some unit (maybe kilometres/second). The speed of light is about 2.997x10^8 metres/second or 671 million miles/hour. Note how the different numerical values depend on the units.
The speed of light c is always fixed at 299792458 m/s.
The speed of light in a vacuum is exactly 299792458 m/s
Speed of light c = 299792458 m/s × 1 km/1000 m = 299792.458 km/s. Speed of light c = 299792.458 km/s × 3600 s/ 1 hr = 1079252848.8 km/hr.
There are 299792458 metres.
By definition, it is 299792458 metres per second.299,792,458 m/s in a vacuum.
The speed of light c is always fixed at 299792458 m/s.
The speed of light in vacuum expressed in meters per second
In vacuum it is 299792458 metres/second. It is used for light to get from one location to another.
The speed of light is approx 299792458 metres per second. And it does not travel any faster nor slower in the US.
1 nautical mile = 1852 meters Speed of light = 299 792 458 m / s Speed of Light = (299792458/1852) nautical miles / second One hour has 60 minutes, each has 60 seconds. 60x60 = 3600 seconds in a hour. In 1 second, light travels 299792458/1852 nautical miles. In 3600 seconds, light travels (299792458/1852)x3600, which is approximately: 582749918,3585 nautical miles / hour
The speed of light in a vacuum is exactly 299792458 m/s
Speed of light c = 299792458 m/s × 1 km/1000 m = 299792.458 km/s. Speed of light c = 299792.458 km/s × 3600 s/ 1 hr = 1079252848.8 km/hr.
Speed of light c = 299792458 m/s × 1 km/1000 m = 299792.458 km/s. Speed of light c = 299792.458 km/s × 3600 s/ 1 hr = 1079252848.8 km/hr.
Speed of light c = 299792458 m/s × 1 km/1000 m = 299792.458 km/s. Speed of light c = 299792.458 km/s × 3600 s/ 1 hr = 1079252848.8 km/hr.
The speed of light in vacuum is the same for everyone regardless of the source. The answer would be 299792458 meters per second. This is an exact result by the way, since the length of a meter is currently defined such that this holds.
299,792.458 km/s in vacuum. Somewhat less in material media. Denoted by the symbol 'C' in equations.
That is approximately the speed of light (c). In metric units it is exactly 299792458 meters per second (299792.458 kilometers per second). Even electrons in atoms travel at approximately the same speed (but always less than speed of light)