Question

a ray diagram for a refracted light ray is shown. what does the dashed line represent? medium boundary normal incident ray

Explanation:

In a ray diagram for refraction, the dashed line perpendicular to the boundary between two media is defined as the normal. It is used as a reference line to measure angles such as the angle of incidence and the angle of refraction. A medium is a substance through which light travels (e.g., air, water). The boundary is the interface between two media (usually shown as a solid line). The incident ray is the incoming light ray (shown as a solid line with an arrow). So the dashed line represents the normal.

Answer:

C. normal