Question

Which of the rays are in the same plane?

• A. Incident ray
• B. Reflected ray
• C. Normal
• D. Emergent ray

Answer 1

Answer: (A), (B), (C)

The correct options are
A

Incident ray

B

Reflected ray

C

Normal

From the laws of reflection, we know that the incident ray(AI), the reflected ray(BI) and the normal (OI) lie in the same plane. Emergent ray is the light ray leaving a medium (glass slab or prism) and it need not be in the same plane as that of the incident ray or the normal.

Light striking a plane surface

Light falling on a glass slab