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

Refractive indices of kerosene,turpentine and water are 1.44, 1,47 and 1.33 respectively, in which material does the light travel fastest and why?

Refractive indices of flint glass for blue and red light are 1.668 and 1.648, respectively. Calculate the dispersive power of the glass.

If the refractive indices of a prism for red, yellow and violet colours be 1.61, 1.63 and 1.65 respectively, then the dispersive power of the prism will be

Refractive index of carbon disulphide for red light is 1.634 and the difference in the values of critical angle for red and blue light at the surface of separation of carbon disulphide and air is 0^(@)56' . What is the value of refractive index of carbon disuphide for blue light?

The refractive indices of the material of the prism and liquid are 1.56 and 1.32 respectively. What will be the value of theta for the following refraction?

The refractive indices of the material of the prism and liquid are 1.56 and 1.32 respectively. What will be the value of theta for the following refraction?

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: