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In vacuum, the speed of light is a constant c = 300 000 000 m/s. In a transparent medium, light slows down by a factor of 1/n where n is called the refractive index of the medium. The refractive index of most common glasses is around 1.5 (3/2), so light will travel at a speed v = c/n = (2/3)c = 200 000 000 m/s in the glass.

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Q: How does the average speed of light in glass compare with it's speed in a vacuum?
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How does the average speed of light glass compare with its speed in a vacuum?

About 2/3 its speed in a vacuum.


How does the average speed of light in glass compare with its speed in a vacuum?

3/4th


How does the average speed of light in glass compare with its speed in vacuum?

Depends on the refractive index of the medium itself


How does the speed of light in glass compare to the speed of light in a vacuum?

It will depend on the type of glass, and something called its refractive index. All materials have a refractive index which will effect the speed of the light through it. The speed of light through a vacuum is 3.0x10^8 m/s, and a material such as glass will be lower than this.


How does the average speed of light in glass compass with 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 .


How does the speed of light compare in water glass and diamond?

Speed of light in vacuum = ' c '-- Speed of light in Air . . 99.97% of ' c '.-- in Water . . . . . . . . 75% of ' c '.-- in Crown Glass . . . 64.9%-- in Flint Glass . . . . . 61.7%-- in Diamond . . . . . . 41.3%


Does the speed of light minimum in air or water or glass or vacuum?

glass


How does light change speed from glass to air?

In glass, light will go somewhat slower than in a vacuum. Air is almost like a vacuum, with respect to the speed of light - some difference still exists, though.In glass, light will go somewhat slower than in a vacuum. Air is almost like a vacuum, with respect to the speed of light - some difference still exists, though.In glass, light will go somewhat slower than in a vacuum. Air is almost like a vacuum, with respect to the speed of light - some difference still exists, though.In glass, light will go somewhat slower than in a vacuum. Air is almost like a vacuum, with respect to the speed of light - some difference still exists, though.


What travels the fastest sound in air rocket in space light in vacuum microwaves in glass?

light in a vacuum


Does light travel faster in glass then it does in a vacuum?

No, slower.


Light travels faster in glass than it does in a vacuum.?

No


Does a light travels faster in glass than it does in a vacuum?

No