1.

Which one of the following has maximum refractive (index)? A) Glass B) Water C) Iron D) Diamond

Answer»

The correct option is D) Diamond.

Diamond has a very high refractive index (about 2.42 compared to about 1.5 for glass). 

Diamonds are cut so that a light ray falling on the diamond is reflected multiple times inside the diamond and therefore sends light out in all direct.



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