1.

The curve of angle of incidence versus angle of deviaton wshown has been plotted for prism. Q. The value of refractive index of the prism used isA. `sqrt(3)`B. `sqrt(2)`C. `sqrt(3)//sqrt(2)`D. `2//sqrt(3)`

Answer» `delta=i+e-A`
`delta_(min)=60^(@)` when `i=e`
`therefore60^(@)=2i-A=2(60^(@))-A` `thereforeA=60^(@)`
`thereforemu=(sin((A+delta_(min))/(2)))/(sin((A)/(2)))=(sin((60+60)/(2)))/(sin((60)/(2)))=sqrt(3)`


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