The figure below shows the refraction of a ray through a prism. Copy the diagram and,ignoring dispersion at the faces $AB$ and $AC$,mark the following angles: $(i)$ The angle of incidence,$(ii)$ the angle of refraction at the face $AB$,$(iii)$ the angle of emergence,and $(iv)$ the angle of deviation.

(N/A) To represent the refraction of a light ray through a prism,we follow these steps:
$1$. Draw a triangular prism $ABC$.
$2$. Draw an incident ray $PQ$ striking the face $AB$.
$3$. Draw a normal $N$ at the point of incidence $Q$ on face $AB$.
$4$. The angle between the incident ray $PQ$ and the normal $N$ is the angle of incidence,denoted by $i$.
$5$. The refracted ray $QR$ travels inside the prism. The angle between the refracted ray $QR$ and the normal $N$ at face $AB$ is the angle of refraction,denoted by $r_1$.
$6$. At face $AC$,the ray emerges as $RS$. Draw a normal $N'$ at the point of emergence $R$.
$7$. The angle between the emergent ray $RS$ and the normal $N'$ is the angle of emergence,denoted by $e$.
$8$. Extend the incident ray $PQ$ forward and the emergent ray $RS$ backward to meet at a point $D$. The angle between these two lines is the angle of deviation,denoted by $\delta$.