Define incidence angle,emergence angle,and deviation angle in the context of a prism.

(N/A) $1$. Incidence angle $(i)$: The angle between the incident ray and the normal at the point of incidence on the first surface of the prism.
$2$. Emergence angle $(e)$: The angle between the emergent ray and the normal at the point of emergence on the second surface of the prism.
$3$. Deviation angle $(\delta)$: The angle between the direction of the incident ray and the direction of the emergent ray. It represents the total change in the path of the light ray due to the prism.