PDF chapter test TRY NOW

Find out, from Table, the medium having highest optical density. Also find the medium with lowest optical density.
 
YCIND_220926_4499_Light reflection and Refraction_18.png
Absolute refractive index of some material media
 
The optical density of a medium is  related to its refractive index. A medium with the lowest refractive index will have the  optical density and vice-versa.
 
So,
 
Lowest optical density -
 
Highest optical density -