Physics
A ray of light XY passes through a right-angled isosceles prism as shown in the adjacent diagram.
(a) What is the angle through which the incident ray deviates and emerges out of the prism?
(b) Name the instrument where this action of prism is put into use.
(c) Which prism surface will behave as a mirror?
Refraction Plane Surfaces
ICSE
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Answer
(a) The angle through which the incident ray deviates and emerges out of the prism is the angle of deviation.
The angle of deviation = the angle which the emergent ray makes with the incident ray XY = 90°.
(b) The instrument where this action of prism is put into use is the periscope.
(c) The surface AB of the prism behaves as a mirror.
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