The refractive index of a prism for a monochromatic wave is `sqrt(2)` and its refracting angle is `60^(@)` for minimum deviation, the angle of indidence will be

Options

A. `30^(@)`
B. `45^(@)`
C. `60^(@)`
D. `75^(@)`

Explanation

Refractive index,
`mu=(sini)/(sinA//2)`
`implies sqrt(2)=(sini)/(sin(60^(@)//2))orsqrt(2)xxsin30^(@)=sini`
or `sqrt(2)xx(1)/(2)=siniimpliesi=45^(@)`