The refractive indices of four substances P,Q,R and S are 1.50, 1.36, 1.77 and 1.31 respectively. The speed of light is maximum in the substance:

The refractive indexes of four substances P,Q,R and S are 1.77, 1.52, 1.65 and 1.36 respectively. When light travelling in air is incident on these substances at equal angles, the angle of refraction will be the maximum in:

The refractive index of four materials A,B,C and D are 1.3, 1.43, 1.71 and 1.52 respectively. When the light rays pass from air into these materials, they refract the minimum in:

The refractive indices of alcohol and glass are 1.35 and 1.5 respectively. The refractive index of glass with respect to alcohol is

Refractive indices of water, sulphric acid, glass and carbon disulphide are 1.33, 1.43, 1.53 and 1.63 respectively. The light travels slowest in:

The refractive indices of glass and water are 1.54 and 1.33 respectively. What is the polarising angle for a beam of light going from water to glass ?

For a medium, refractive indices for violet, red and yellow are 1.62, 1.52 and 1.55 respectively, then dispersive power of medium will be

Refractive indices of carbon disulphide and ethyl alcohol are 1.63 and 1.36 respectively. Which is optically denser?