(a) Define the term absolute refractive index. The absolute refractive index of diamond is 2.42. What is the meaning of this statement ? (b) Refractive indices of media A, B, C and D are given below : {:("Media",A,B,C,D),("Refractive Index",1.33,1.44,1.52,1.65):} In which of these four media is the speed of light (i) minimum and (ii) maximum ? Find the refractive index of medium C with respect to medium B.

(a) Define the term absolute refractive index. The absolute refractive

1.	(a) Define the term absolute refractive index. The absolute refractive index of diamond is 2.42. What is the meaning of this statement ? (b) Refractive indices of media A, B, C and D are given below : {:("Media",A,B,C,D),("Refractive Index",1.33,1.44,1.52,1.65):} In which of these four media is the speed of light (i) minimum and (ii) maximum ? Find the refractive index of medium C with respect to medium B.
Answer» Solution :(a) For absolute REFRACTIVE index, see Point Number 23 under the HEADING "Chapter At A GLANCE". For meaning of refractive index of diamond as 2.42. (b) (i) SPEED of light in media D is MINIMUM because its refractive index is maximum. (ii) Speed of light in media A is maximum because its refractive index is minimum. Refractive index of medium C w.r.t. medium B. `n_(CB) = (n_(C))/(n_(B)) = (1.52)/(1.44)=1.06`