1.

What is the refractive index of a prism whose angle A=60^(@) and angle of minimum deviationd_(m)=30^(@)?

Answer»

`sqrt(2)`
`1/(sqrt(2))`
`1`
`1/(sqrt(3))`

Solution :(a) REFRACTIVE index of PRISM
`mu=("sin" (A+delta_(m))/2)/("sin"A/2)=("sin"(60^(@)+30^(@))/2)/("sin"(60^(@))/2)`
`(sin 45^(@))/(sin 30^(@))=(1//sqrt(2))/(1//2)=1/(sqrt(2))xx2/1=sqrt(2)`


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