Find out, from Table, the medium having highest optical density. Also find the medium with lowest optical density.
Find out, from Table, the medium having highest optical density. Also find the medium with lowest optical density.
MaterialmediumRefractive indexMaterial mediumRefractiveindex
Air1.0003Canada Balsam1.53
Ice1.31
Water1.33Rock salt1.54
Alcohol1.36
Kerosene1.44Carbon disulphide1.63
Fusedquartz1.46Denseflint glass1.65
Turpentine oil1.47Ruby1.71
Benzene1.50Sapphire1.77
Crownglass1.52Diamond2.42

Answer-

Air has the lowest optical density.

Diamond has the highest optical density.

The refractive index of a medium is directly proportional to its optical density. The optical density of a medium with the highest refractive index will be the highest, and vice versa.

The table shows that air and diamond have the lowest and highest refractive indexes, respectively. As a result, air has the lowest optical density while diamond has the highest.