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# Is it possible to travel at the speed of light in water?

Updated: 10/25/2022

Wiki User

13y ago

The speed of light in water is less than the speed of light in space. Only light can travel at the speed of light.

Wiki User

13y ago

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Q: Is it possible to travel at the speed of light in water?
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### How fast can light travel in water?

The speed of light in water is about 225,400 kilometres per second.

### What color water does light travel through fastest?

According to the light spectrum, water should travel through a more violet coloured water the fastest. The speed of light through a medium is not governed by its wavelength, so colour is not a factor.

### Does light speed up or slow down when it leaves water into the air?

The speed of light in air is almost but not quite the same as its speed in vacuum,whereas its speed in water is about 25% less.So when light passes from air into water, its speed drops by about 25% .

### Is this true Light waves do not change speed as they travel from air through water?

no. they slow down.

### Light travel faster in water or kerosene?

The speed of light in water is approx 225,400,000 metres per second. Its speed in kerosene is 215,700,000 metres per seconds. So it travels around 4.5% faster in water.

### Can the speed of light be the same in all media?

The speed of light varies, depending on the medium. It also varies a bit depending on the frequency. The speed of light in different materials is less than the speed of light in empty space. When physicists talk about the speed of light being an absolute limit, they're talking about the speed of light in a vacuum. It's perfectly possible for material objects to travel faster than light in a particular medium ... for example, electrons emitted by radioactive elements (beta rays) often move faster than the speed of light in water.

### What happens to the speed of light when it travels from air into water?

the speed of light never changes but when the light beam goes from air to water, it refracts. this is when the light beam alters direction because it hits an object of greater or less density (in this case it is higher).

### How fast does light travel though water?

About 2/3 the speed of light in a vacuum.

### Which formula you use to calculate for the speed of light in water?

Speed of light in water = speed of light in vacuum/refractive index of water

### All forms of energy in the elctromatic spectrum travel at the same speed of?

The speed of light. The speed is the same, if the EM waves travel through empty space. In other media, like air or water, they are usually slower.

### Does light travel fastest in space in air in water or through glass?

Light's apparent speed is fastest definitely in a vacuum and slower in water or glass. Light in air behaves more like in a vacuum than in water or glass.

### When light enters water it slows down when it exits it speed up again How is this possible and where does it get the energy to do so?

The hydrogen in water causes the speed of light to slow down. When it exits, the air and gravity cause it to speed up again. It gets the energy from gravity.