question_answer 26)

Find out, from table, the medium having highest optical density. Also find the medium with lowest optical density.

Answer:

Absolute refractive index of some material media.  

Material medium	Refractive index	Material medium	Refractive index
Air	1.0003	Canada Balsam	1.53
Ice	1.31	Rock salt	1.54
Water	1.33	Carbon disulphide	1.63
Kerosene	1.44	Dense flint glass	1.65
Fused quartz	1.46	Ruby	1.71
Turpentine oil	1.47	Sapphire	1.77
Benzene	1.50	Diamond	2.42
Crown glass	1.52

  The medium with highest refractive index will have highest optical density. So, diamond has highest optical density. The medium with lowest refractive index will have lowest optical density. So, air has lowest optical density.