question_answer

The refractive index of a particular material is 1.67 for blue light, 1.65 for yellow light and 1.63 for red light. The dispersive power of the material is.........  [KCET 2004]

A)            0.0615                                     

B)            0.024

C)            0.031                                       

D)            1.60

Correct Answer: A

Solution :

           = 0.615.