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optical density
This term is a technical specification used primarily in physics, chemistry, and molecular biology. It describes the opacity of a substance, where a higher value indicates that more light is absorbed or scattered and less is transmitted through the sample.
In laboratory settings, it is frequently used interchangeably with absorbance, although strictly speaking, optical density refers to the physical property of the medium while absorbance refers to the amount of light absorbed by a specific solute. Because it is a logarithmic ratio, it allows researchers to linearize the relationship between the concentration of a substance and the light it blocks.
Meanings
Examples
The spectrophotometer measures the optical density of the sample to determine the concentration of the solute.
The spectrophotometer measures the optical density of the sample to determine the concentration of the solute.
We need to adjust the path length to get a more accurate reading of the optical density.
The optical density of the solution increased as more dye was added to the beaker.
Check if the optical density is within the linear range of the detector.
I wonder if the optical density of this film is consistent across the entire surface.
The researcher noted a significant change in optical density after the chemical reaction occurred.
Wait, is the optical density too high for the light to pass through effectively?
Optical density is often used interchangeably with absorbance in many laboratory settings.
Optical density is often used interchangeably with absorbance in many laboratory settings.
The filter was chosen specifically for its high optical density at ultraviolet wavelengths.
The filter was chosen specifically for its high optical density at ultraviolet wavelengths.