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Question:

The path of a ray of light passing through a glass prism is shown below: In this diagram the angle of prism, angle of incidence, angle of emergence and angle of deviation respectively have been represented by: O, Y, Z and N; P, Y, M and Z; O, X, M and Z; P, X, Z and N

O, Y, Z and N,

O, X, M and Z

P, X, Z and N

P, Y, M and Z,

Solution:

Angle of prism=∠O, (angle between two refracting surfaces)
Angle of incidence=∠X(angle between incident ray and normal) ,
Angle of emergence=∠M(angle between emergent ray and normal)
Angle of deviation=∠Z(angle between incident ray and emergent ray)