Short answerEasy1 mark
3(vii)
A monochromatic ray strikes the surface of identical prisms (A, B and C) at different angles of incidence. The diagram below shows their refracted rays. Study the path of these refracted rays and identify in which of the diagrams:
the angle of incidence is equal to the angle of emergence.
Topic: Minimum deviation in a prism
Question wording verified against source paper
Answer
Exam answer
Prism C.
Explanation
The internal ray is parallel to the base, giving a symmetrical path and i = e.
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