How Does Air Move in a Vacuum?

Thread starter JPC
Start date Jan 27, 2007
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Speed Vacuum

In summary, a vacuum does not have a speed because it is not a physical object. The speed of light in a vacuum is considered the speed limit of the universe because of the fundamental properties of space and time. According to Einstein's theory of relativity, it is not possible for any object with mass to travel at the speed of light in a vacuum. The speed of light in a vacuum is a universal constant that does not have any exceptions. It differs from the speed of light in other mediums, which can vary due to interactions with particles in the medium.

Jan 27, 2007

JPC

This might sound silly , but can a vacuum have a speed ?

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Jan 27, 2007

Danger

Gold Member

A vacuum isn't a thing; it's a lack of anything. The material that is displaced in order to create a vacuum will have a speed.

Jan 27, 2007

DaveC426913

Gold Member

How fast can vacuum fill a container? The question is more correctly 'how fast can air leave the container?'

1. Can a vacuum have a speed?

No, a vacuum is not a physical object and therefore does not have a speed. It is simply the absence of matter, including air.

2. Why is the speed of light considered the speed limit of the universe?

The speed of light in a vacuum, also known as c, is the fastest possible speed at which energy, matter, and information can travel. This limit is due to the fundamental properties of space and time.

3. Is it possible for any object to travel at the speed of light in a vacuum?

No, according to Einstein's theory of relativity, an object with mass would require an infinite amount of energy to reach the speed of light in a vacuum. Therefore, it is not possible for any object with mass to travel at this speed.

4. Are there any exceptions to the speed of light in a vacuum being a constant?

No, the speed of light in a vacuum is a universal constant and is the same for all observers, regardless of their relative motion or position. This is a fundamental principle in physics known as the theory of special relativity.

5. How does the speed of light in a vacuum differ from the speed of light in other mediums?

The speed of light in a vacuum is the maximum speed at which light can travel. In other mediums, such as air, water, or glass, the speed of light is slower due to interactions with particles in the medium. This is known as the refractive index and can vary depending on the properties of the medium.