What is optical density of a medium?
The optical density of any medium is defined as the logarithmic ratio of the intensity of incident light (Io) to the intensity of the transmitted light (It) passing through that medium.
What is TIR explain in brief?
Total Internal Reflection (TIR) is a phenomenon in optics, by which light experiences complete reflection at an interface between two media. Most optical fibers use TIR as the guiding principle.
What is optical density physics?
Optical density is the process of transmission of light or other electromagnetic radiation by matter. The process of emission and absorption depends on the wavelength of the radiations, which includes the interaction between fundamental particles like electrons, atoms, ions, etc.
What is optical density in optics?
The optical density or absorbance of a material is a logarithmic intensity ratio of the light falling upon the material, to the light transmitted through the material.
What is optical density of a medium class 12?
What is optical density? Optical density of a medium is the ability of that medium to refract light. Medium in which speed of light is more as compared to the other mediums is called optically rarer medium and the one in which speed of light is less is optically denser.
What is optical density give example of optically denser medium?
Examples of optically denser medium are when we are comparing two medium air and water, air is the rare medium and water is the denser medium. Examples of optically denser medium are when we are comparing two medium air and water, air is the rare medium and water is the denser medium.
How are optical density and refractive index of a medium related to each other?
We can say that optical density is directly proportional to refractive index and inversely proportional to speed of light for that given medium.
Which medium has the highest optical density?
diamond
The medium with highest optical density is diamond, and its refractive index is maximum (=2.42). Also, the medium with lowest optical density is air, and its refractive index is minimum (=1.0003).
Why optical density is measured?
Optical density (OD) of the culture is measured to estimate the growth and metabolic activity of the cells. Optical density is a logarithmic function and increasing the number of light absorption unit by one means that the intensity of light passing through the sample has diminished 10 times!
What is optical density example?
–The meaning of optical density. For example, if the incident light intensity is 1000 units and the transmitted intensity is 1/100 of this, viz., 10 units, then the density is given by: Density = log 1000 10 = log 100 = 2 .