Optics Question 828
Question: The following data are given for a crown glass prism;refractive index for violet light $ n _{v}=1.521 $ refractive index for red light $ n _{r}=1.510 $ refractive index for yellow light $ n _{y}=1.515 $ Then the dispersive power of a parallel glass slab made of the same material is
Options:
A) 0.01
B) 0.03
C) 0
D) 0.02
Show Answer
Answer:
Correct Answer: D
Solution:
[d] Dispersive power $ (\omega ) $
$ =\frac{n _{v}-n _{r}}{n _{y}-1}=\frac{1.521-1.510}{1.515-1}=0.02 $
