Question

Draw a ray diagram to show the refraction of a monochromatic ray through a prism when it suffers a minimum deviation. How is the angle of emergence related to the angle of incidence in this position.

Answer 1

The refraction of a monochromatic light beam through a prism when it experiences the lowest deviation is depicted in the diagram below:

The angle of emergence = the angle of incidence in the minimum deviation position prism in minimum deviation position ∠i = ∠e