A student traces the path of a ray of light through a triangular glass prism for different values of angle of incidence

A student traces the path of a ray of light through a triangular glass prism for different values of angle of incidence. On analysing the ray diagrams, which one of the following conclusions is he likely to draw?

• A: The emergent ray is parallel to the incident ray.
• B: The emergent ray bends at an angle to the direction of the incident ray.
• C: The emergent ray and the refracted ray are at right angles to each other.
• D: The emergent ray is perpendicular to the incident ray.
• Correct Answer: B

• Exam Year: 2015