a prism with refracting angle of 60 degree, gives minimum deviation 53,51 52 degree for blue, red ,and yellow light - Physics - Ray Optics And Optical Instruments

Question

a prism with refracting angle of 60 degree, gives minimum deviation
53,51&52 degree for blue, red ,and yellow light wat is the
dispersive power of the material of the prism?

Rupak Bhattacharya · Accepted Answer

We know  n=sin(A+D2)sin(A2)now nb=sin(56
5)sin30=0 833880 5=1 667and  nr=sin(55 5)sin30=0 82410
5=1
6482so taken into consideration two extreme colour blue and red we can calculate thedisperssive power asω=nb-nrnwhere n= nb+nr2=1
6576and  ω =0 01881 6576=0
0113   [ans]

a prism with refracting angle of 60 degree, gives minimum deviation 53,51&52 degree for blue, red ,and yellow light.wat is the dispersive power of the material of the prism?