It is 299,792.458 km per second.
Roughly, the figure of "300 thousand km per second" is easy to remember,
and it's wrong by only 0.07 percent.
The speed of light is roughly 300,000 kilometers per second. You'll have to get your own mass.
The speed of light isn't a distance so it has no length it is a measure of speed, which is roughly 186000 miles per second.
The speed of light(roughly 186,000 Miles per second) is a universal constant.
3x108 metres per second is the speed of light roughly, so 9 times that is 2.7x109 metres per second or 2,700,000,000 m/s
In a vacuum, the speed of light is 299,792,458 meters per second, which is roughly 300,000 km/second or 186,000 miles/second.
Wavelength is in meters, the frequency is in hertz. period is in seconds and the wave speed is in meters per second.
The speed of light is 299,792,458 meters per second .The magnitude of the square root of that quantity is roughly 17,314.5 ,and its unit is [ square root of (meter / second) ] .The square root of a speed has no physical significance or meaning.
A few on-line resources all cluster around roughly 217,400,000 meters per second.
What is the approximate speed of light in kilometer per second?"
kilogram per second is the approximate speed of light
The speed of light is approximately 18,000,000,000 centimeters per minute.
The speed of light is 186,000 miles per second in a vacuum.