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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 in Brief
Diagram
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Solution
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
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