Water's index of refraction is 1.333
1.331.33
The index of refraction of a substance can be determined mathematically using Snell's Law, which relates the angle of incidence and refraction to the refractive indices of the two substances involved. By measuring the angles of incidence and refraction, the index of refraction can be calculated using the formula n = sin(i) / sin(r), where n is the refractive index, i is the angle of incidence, and r is the angle of refraction.
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.
The index of refraction tells you by which factor the speed of light in the medium is slower than in a vacuum. This value is 1 for a vacuum, and a number greater than 1 for other media. The exact value depends on the medium.
Light always takes the shortest path possible through any medium. As such, when it travels through a vacuum, it travels in a straight line (no refraction). When it travels through the air, the molecules in the air scatter it very slightly, causing some diffusion and refraction, depending on the composition of the air through which it passes. When it travels through water, the shortest path through that medium is not a straight, collinear line from the point of incidence...it is actually offset by a small angle (the angle of refraction). The bent path that light takes through water or another substance is actually the shortest path available to it through that medium.
It is because the index is related to the velocity of light in air (ideally vacuum) and the medium in question. Since the velocity of light in vacuum is greater than it can be in any other media, the index of refraction of these other media relative to the vacuum is greater than 1.However, if you studied light travelling through glass and then water, the index of refraction between those two would be 0.89 (approx).
It's 1/0.8 = 1.25
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.
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.
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.
Light does not refract via a single material. Refraction occurs when light passes from one material into another of a different density. It is the amount of difference in densities that causes the refraction. The greater the difference the greater the refraction. I believe that the densest material would be diamond, so light passing through a diamond and into a vacuum would seem to be the greatest difference, causing the greatest refraction.