Refractive indices of turpentine oil, sapphire, water and crown glass are 1.47, 1.77, 1.33 and 1.52 respectively. In which of these media will a ray of light incident obliquely at the same angle from air would bend the least?
The speed of light in a medium is inversely proportional to the refractive index of the medium. And the amount of bending is also inversely proportional to the refractive index of the medium. As the refractive index of water is the least out of the given media, it is optically rarer as compared to the other media. So, light will bend the least in water.