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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.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoDifferent 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.
Wiki User
∙ 9y agoIn 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.
Wiki User
∙ 13y agothe speed of light is currently 0.5 of a killisecond.
Wiki User
∙ 13y agoAs 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.
Wiki User
∙ 7y ago1484 metres per second in water and 6100 metres per second in steel.
Wiki User
∙ 13y ago0m/s, iron is opaque to light.
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Is the flash as fast as the speed of light?
NO.... the speed of light is always faster. =)
How is the speed of light and speed of sound related?
The speed of light is about 900,000 times as fast as the speed of sound in air.
How do you find the speed of light?
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.
Is speed still called speed after it reaches the speed of light?
Yes, speed can be any value. The speed of light is extremely fast at 3 x 108 ms-1
What is frequency of rotating mirror in speed of light?
very fast
If you are moving at the speed of light how fast will you fall apart?
If you are moving at the speed of light, then "how fast" has no meaning.
Is the flash as fast as the speed of light?
NO.... the speed of light is always faster. =)
How fast was Hermes?
Fast as thought or speed of light
Is a cheetah faster than the speed of light?
No, they are not. Nothing is as fast as the speed of light.
How is the speed of light and speed of sound related?
The speed of light is about 900,000 times as fast as the speed of sound in air.
What is speed paint?
It is fast to light
What will be the speed of light in glass?
fast
How fast is the cellular phone industry growing?
The speed of light dawg, the speed of light
Can you make the speed of light?
No you cannot create the speed of light its too fast to create
How fast does light travel per foot?
the speed of light
How fast did Greek chariots go?
They travel to the speed of light? to it? and where exactly is the speed of light?
How fast is eye sight?
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.
