# Relationship between refractive index and optical density conversion

### How does optical density relate to mass density and refractive index? | Physics Forums

One indicator of the optical density of a material is the index of refraction value of the The n values of other materials are found from the following equation. The refractive index of the resin rises linearly with conversion (r2 by interposing a neutral density filter (optical density of 1) between the. The optical density of a medium is not the same as its physical density. The physical density of a material refers to the mass/volume ratio. Optical density.

### Optical Density and Light Speed

When the wave impinges upon a particle of matter, the energy is absorbed and sets electrons within the atoms into vibrational motion. If the frequency of the electromagnetic wave does not match the resonant frequency of vibration of the electronthen the energy is reemitted in the form of an electromagnetic wave. This new electromagnetic wave has the same frequency as the original wave and it too will travel at a speed of c through the empty space between atoms.

The newly emitted light wave continues to move through the interatomic space until it impinges upon a neighboring particle. The energy is absorbed by this new particle and sets the electrons of its atoms into vibration motion. And once more, if there is no match between the frequency of the electromagnetic wave and the resonant frequency of the electron, the energy is reemitted in the form of a new electromagnetic wave.

The cycle of absorption and reemission continues as the energy is transported from particle to particle through the bulk of a medium. Every photon bundle of electromagnetic energy travels between the interatomic void at a speed of c; yet time delay involved in the process of being absorbed and reemitted by the atoms of the material lowers the net speed of transport from one end of the medium to the other.

## Optical Density and Light Speed

Optical Density and the Index of Refraction Like any wave, the speed of a light wave is dependent upon the properties of the medium. In the case of an electromagnetic wave, the speed of the wave depends upon the optical density of that material.

The optical density of a medium is not the same as its physical density. The optical density of a material relates to the sluggish tendency of the atoms of a material to maintain the absorbed energy of an electromagnetic wave in the form of vibrating electrons before reemitting it as a new electromagnetic disturbance.

The more optically dense that a material is, the slower that a wave will move through the material. One indicator of the optical density of a material is the index of refraction value of the material.

Index of refraction values represented by the symbol n are numerical index values that are expressed relative to the speed of light in a vacuum. The index of refraction value of a material is a number that indicates the number of times slower that a light wave would be in that material than it is in a vacuum.

The amount of bending that a light ray experiences can be expressedin terms of the angle of refraction more accurately, by thedifference between the angle of refraction and t…he angle ofincidence. A ray of light may approach the boundary at an angle ofincidence of degrees and bend towards the normal.

## How does optical density relate to mass density and refractive index?

If the mediuminto which it enters causes a small amount of refraction, then theangle of refraction might be a value of about degrees. On theother hand if the medium into which the light enters causes a largeamount of refraction, the angle of refraction might be degrees. These values are merely arbitrarily chosen values to illustrate apoint.

The diagram below depicts a ray of light approaching threedifferent boundaries at an angle of incidence of degrees. Therefractive medium is different in each case, causing differentamounts of refraction.

Relations Of Refractive - Index

Which is the largest refractive index material that can be used for optical communication and what is its refractive index? It depends on what you mean by "for optical communication", but the standard Optical fibers that route light around have an index of 1.

But for on-chip elec…tronics, Silicon or Gallium Arsenide are typically used, which have indices of 3. These values are about the largest one can find for any materials that are also low-loss for light. Some researchers are looking into the field of 'plasmonics' which incorporates metals, which have much higher refractive indices, but metals are also very lossy, so most of these attempts are still in the research phase.

### Optical Density | Units | Formula | [email protected]

Relation between refractive index and refractive power? The refractive index and refractive power are both directly proportional because due to power the distance is decrease or increase if power increases or decreases and to r…efractive index the bending of light occurs in towards or away.

• Optical Density

Bending of light ray and distance of light ray are directly proportional so refractive index and power are directly proportional. They have very little connection, except that the same big word appears in both terms. Refractive index of a substance is the ratio of the speed of light in vacuum to the speed of light in that substance.

Refractive power of an optical device, like a lens, does naturally depend somewhat on the refractive index of the material used to make the lens, but it's got much more to do with the shape of the lens You can make lenses with a wide range of different refractive powers, all out of the same kind of glass with the same refractive index.

And you can construct lenses that all have the same refractive power out of many many different substances with different refractive indexes, like crown glass, flint glass, plastic, jello etc. So in that sense, the two are completely unrelated.

What is the relationship between a refraction and an optical illusion?