It about 2*10^8 m/s.
The speed of light is slower when passing through glass, or any other transparent substance, compared to the speed of light passing through a vacuum. The actual speed depends on the refractive index of the glass, which depends on the composition of the glass.
Different glasses have different indices of refraction, i.e., different speeds of light. The index of refraction - and therefore the speed of light - also typically varies slightly for different wavelengths. A typical value for the speed of light is about 2/3 the speed of light in a vacuum. That is, since the speed of light in a vacuum is 300,000 km/sec., the speed of light in glass would be about 200,000 km/sec.
In Science, the phrase "speed of light" is used to denote the speed with which light, or
any other wavelength of electromagnetic radiation, travels from one place to another.
That is, the distance between the two points, divided by the time required by light to
traverse the distance.
The speed depends on the electrical and magnetic properties of the substance,
or lack thereof, through which the light is traveling. The speed in vacuum is
299,792,458 meters per second ... almost 671 million miles per hour.
the speed of light is currently 0.5 of a killisecond.
As steel is a conductor, electromagnetic radiation and therefore light cannot propagate through it.
There is no such thing as a speed of light through steel.
1484 metres per second in water and 6100 metres per second in steel.
0m/s, iron is opaque to light.
NO.... the speed of light is always faster. =)
The speed of light is about 900,000 times as fast as the speed of sound in air.
Turn your light off then on, how long time does it takes. There you got the speed of light !!!! 300,000 km a sec is fast.
Yes, speed can be any value. The speed of light is extremely fast at 3 x 108 ms-1
very fast
If you are moving at the speed of light, then "how fast" has no meaning.
NO.... the speed of light is always faster. =)
Fast as thought or speed of light
No, they are not. Nothing is as fast as the speed of light.
The speed of light is about 900,000 times as fast as the speed of sound in air.
It is fast to light
fast
The speed of light dawg, the speed of light
No you cannot create the speed of light its too fast to create
the speed of light
They travel to the speed of light? to it? and where exactly is the speed of light?
The speed of eyesight varies depending on factors such as the speed of light and the time it takes for signals to travel from the eyes to the brain. Light travels at approximately 186,282 miles per second, but the brain processes visual information in a matter of milliseconds. Overall, the speed of eyesight is incredibly fast and allows for near real-time perception of the environment.