Which of the following statements is correct regarding the propagation of light of different colours of white light in air?

In the given ray diagram correct relation for Snell's law is

The refractive index of medium $B$ with respect to medium $A$ in the given figure is given by

What do you understand by monochromatic light and polychromatic light?

Figure shows a ray of light as it travels from medium 1 to medium 2. If refractive index of medium 1 with respect to medium 2 is $\frac{\sqrt{2}}{\sqrt{3}}$ then the value of angle x is 

If a beam of red light and a beam of violet light are incident at the same angle on the inclined surface of a prism from air medium and produce angles of refraction $r \mathrm{and} v$ respectively. Which of the following is correct?

In the diagram given below, X and Y are the end colours of the spectrum of white light. The colour 'Y' represents the _____.