The speed of light in a vacuum is 300,000 km/second.
The magnitude of average velocity is the total distance traveled divided by the total time taken, regardless of the direction. It gives the overall speed at which an object has moved over a certain period.
Average speed = Total distance / Total time
The speed of light is constant.
The speed of light is constant in a vacuum, and it is directly proportional to the wavelength of light. This means that as the wavelength of light increases, the speed of light remains the same.
Neutrinos do not travel at the speed of light, but they do move very close to the speed of light.
The speed of light in vacuum is 299,792,458 meters per second, and that's not an average. That's what it always is.
The speed of light in a vacuum is about 300,000,000 kilometers per second. Since light can't travel at any other speed (in a vacuum), that's also the average speed.
3/4th
About 2/3 its speed in a vacuum.
There are several different types of glass, and light has a somewhat different speed in each of them. On the average, the speed of light across all typical types of glass is in the neighborhood of 2/3 its speed in vacuum, or around 200,000 km/sec .
186,000 miles per second
Depends on the refractive index of the medium itself
The speed of light in air is approx 299,700,000 metres per second. This is not very different from its maximum speed which is its speed in vacuum: 299,792,458 metres per second. The fact that the beam emerges from water is irrelevant.
At its average distance from the earth, the moon is 1.28 light seconds away.
There are three different speeds here.The average speed of electrons - whether there is a current or not - is a significant fraction of the speed of light. That speed depends on the temperature. (The average VELOCITY of course is zero if there is no current, since as many electrons will go in one direction as in another.) The drift velocity (the average velocity) of the electrons is a small fraction of a millimeter per second. The exact value depends on the current, the cross section, and the material. The speed at which a signal can propagate in copper is about 2/3 of the speed of light in a vacuum - so, about 200,000 km/second. It is this speed that makes your light react quickly when you activate a switch.
Is what the speed of light or light speed.ANSWER300,000 km/s
YESBut ideally, NO.Explanation:Ideally, the calculated average speed should NOTinclude stopped time.But on a device like a GPS, time spent stopped IS included in your average speed,thus lowering it significantly.