| 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 |
A) 0.01
B) 0.03
C) 0
D) 0.02
Correct Answer: D
Solution :
[d] Dispersive power \[(\omega )\] \[=\frac{{{n}_{v}}-{{n}_{r}}}{{{n}_{y}}-1}=\frac{1.521-1.510}{1.515-1}=0.02\]
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