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Question
A ray of light XY passes through a right-angled isosceles prism as shown below
- What is the angle through which the incident ray deviates and emerges out of the prism?
- Name the instrument where this action of the prism is put into use.
- Which prism surface will behave as a mirror?
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Solution
- Angle of deviation = the angle which the emergent makes with the incident ray
XY = 90° - Periscope
- The prism's surface AB, functions as the mirror.
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