" Define dispersion."

Define dispersive power of a prism.

Define dispersive power (for light) of a medium.

Define the Dispersion of light .

Define dispersive power of the material of a prism. How can it be measured?

Define Dispersive Power.

Explain and define dispersive power of a transparent material. Obtain its expressions in terms of angles of deviation and refractive indices. OR Define Dispersive Power. Derive an expression for the same.

(a) Define refraction and state at least three examples of refraction. (b) Describe dispersion of white light into its constituent colours.