state gov BSSC Laboratory Assistant Mock Test Series 2025 Physics Ray Optics Refraction and Reflection
A medium shows relation between \(i\) and \(r\) as shown. If speed of light in the medium is \(nc\) then value of \(n\) is
1
1.5
2
2
3
2\(^{-1}\)
4
3\(^{-1/2}\)