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It's 1/0.8 = 1.25

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Q: What is the index of refraction for a material in which light travels with a speed that is 80 percent the speed of light in a vacuum?
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Does light travel faster in a material with a higher index of refraction?

No, light travels slower in a material with a higher index of refraction compared to vacuum or air. This is because the speed of light is inversely proportional to the index of refraction of the material according to the equation v = c/n, where v is the speed of light in the material, c is the speed of light in vacuum, and n is the index of refraction.


does light travels three-fourths as fast through water as it does a vacuum. what is water's index in refraction?

Water's index of refraction is 1.333


Light travels three-fourths as fast through water as it does through a vacuum What is water's index of refraction?

1.331.33


The average speed of light is greatest in?

The velocity of light travelling through a material relates to the index of refraction of that material. In this group, air has the lowest index of refraction, follow by water, fused quartz, and crown glass. This means like travels the fastest through air, then water, then fused quarts, and finally glass.


If the speed of light in a vacuum is 1.2 times that of the speed of light in a given material what is the index of refraction for that material?

2 (no units)


Suppose light travels 15 times faster in a vacuum than it does in glass What is the index of refraction for glass Express your answer as a decimal?

The index of refraction for glass is 1.5. This value is calculated by dividing the speed of light in a vacuum by the speed of light in the material, which gives us 3.0 (speed in a vacuum) divided by 2.0 (speed in glass). This means light travels at 2/3 the speed in glass compared to a vacuum, resulting in an index of refraction of 1.5.


Suppose light travels 1.5 times faster in a vacuum than it does in glass. What is the index of refraction for glass Express your answer as a decimal.?

The index of refraction for glass is calculated by taking the speed of light in a vacuum and dividing it by the speed of light in glass. Since light travels 1.5 times faster in a vacuum, the index of refraction for glass would be 1 divided by 1.5, which equals 0.67.


Ratio of the speed of light in a vacuum to the speed of light in a material?

The index of refraction.


The speed of light in a vacuum is 1.5 times that of the speed of light in a given material what is the index of refraction for that material?

Also 1.5. That's how the index of refraction is defined.


What determines the index of refraction?

The index of refraction of a material is determined by its optical density, which is influenced by the speed of light through that material compared to the speed of light in a vacuum. The index of refraction may also depend on factors such as the material's composition, structure, and temperature.


What is materials index of refraction?

It's (the speed of light in vacuum)/(the speed of light in the material) .


What is the materials index of refraction?

It's (the speed of light in vacuum)/(the speed of light in the material) .