What is optical density class 10th?

The optical density of a material is a logarithmic ratio of the falling radiation to the transmitted radiation through a material. It is also referred as a fraction of absorbed radiation at a particular wavelength. The refractive index of the material is an indicator of its optical density.

What is optical density short answer?

The optical density is a property of a transparent material that measures the speed of the light through the material. The extent to which any optically dense medium bends transmitted light rays towards or away from the normal is called the optical density.

What is optical density example?

Optical density is defined by the equation: –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 .

How do you interpret optical density?

For absorbance measurements, the optical density (O.D.) is a logarithmic measurement of the percent transmission (\%T) and it can be represented by the equation, A = log10 100 / \%T. That means a sample with: 1 O.D. allows 10\% of light to be transmitted through the sample.

What is meant by optically rarer and optically denser medium?

A medium in which the speed of light is more is known as an optically rarer medium. Air is an optically rarer medium as compared to glass and water. A medium in which the speed of light is less is known as an optically denser medium. Glass is an optically denser medium than air and water.

What does optical density mean in microbiology?

Optical density (OD) measurement of bacterial cultures is a common technique used in microbiology. Researchers have primarily relied on spectrophotometers to make these measurements, however the measurement is actually based on the amount of light scattered by the culture rather than the amount of light absorbed.

What is greater optical density?

Diamond: the refractive index of diamond is 2.42, that is highest. The optical density is directly dependent on the refractive index. Thus, the diamond is the material that has maximum optical density.

What is the difference between rarer and denser medium?

The medium with greater refractive index is called the denser medium and the one with smaller refractive index is called the rarer medium. When wave travels from rarer to denser medium the refracted ray bends towards the normal and the angle of refraction is less than the angle of incidence.

When can we say that a medium is optically denser than the other?

When water travels through water, its speed gets reduced. Hence, it is a optically denser medium. Speed of light in air is more than speed of light in water, which means water is optically denser than air.