Find out, from Table, the medium having the highest optical density. Also, find the medium with the lowest optical density.
| Material medium | Refractive index | Material medium | Refractive index |
| Air | 1,0003 | Canada Balsam |
1.53 |
|
Ice |
1.31 | - | - |
|
Water |
1.33 | Rock salt | 1.54 |
|
Alcohol |
1.36 | - | - |
|
Kerosene |
1.44 | Carbon disulfide | 1.63 |
|
Fused quartz |
1.46 | Dense flint glass | 1.65 |
|
Turpentine oil |
1.47 | Ruby | 1.71 |
|
Benzene |
1.50 | Sapphire | 1.77 |
|
Crown glass |
1.52 | Diamond | 2.42 |
Lowest optical density = Air
The Highest optical density = Diamond
The optical density of a medium is directly related with its refractive index. A medium with the highest refractive index will have the highest optical density and vice-versa.
It can be observed from the table that air and diamond respectively have the lowest and highest refractive index. Hence, air has the lowest optical density and diamond has the highest optical density.
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