The path of a light ray, from air to three different media A, B and C for a given angle of incidence. Study the diagram carefully and answer the following questions.

Which of the three media A, B or C has maximum optical density?

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answer is C.

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Detailed Solution

Medium C will have maximum optical density.
“Optical density is the process of transmission of light by matter.” This depends upon the wavelength of the radiation, which includes the interaction between the electrons, ions, atoms, etc. Optical density is the measure of the extent to which light is being refracted by a medium. The optical density of a medium is the ratio of sin 60° to sin r. Thus, C has the lesser refracting angle and maximum optical density. More high the optical density, the lower will be the transmittance.

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