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In the following diagram, the path of a ray of light passing through a glass prism is shown below.
In this diagram, the angle of incidence, the angle of emergence and the angle of deviation respectively, are 1 mark [CBSE2014]
X, R and T
Y, Q and T
X, Q and P
Y, Q and P
Angle of incidence is the angle made by the incident ray with the normal to the first surface of prism, which is shown by angle Y. Angle of emergence is the angle made by the emergent ray with the normal to the surface when it comes out from the prism after refraction, which is shown by angle Q. Angle of deviation is the angle between the incident ray and the emergent ray, which is shown by angle P.
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