Which of the following colours combines to form green colour?

The ray of light that bends the most

Explain the refraction of light with the help of a Glass Prism.

What causes the dispersion of white light? 

The angle of deviation through a prism is minimum when 

(A) Incident ray and emergent ray are symmetric to the prism

(B) The refracted ray inside the prism becomes parallel to its base

(C) Angle of incidence is equal to that of the angle of emergence

(D) When angle of emergence is double the angle of incidence

Choose the correct answer from the options given below :

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