The ray that is part of ray 1 that is reflected on a smooth surface is ray 2. (Option A).
How does light reflect on a smooth surface?
When light encounters a smooth surface, it undergoes reflection following the law of reflection.
This law states that the angle of incidence, which is the angle between the incident light ray and the normal, is equal to the angle of reflection, the angle between the reflected ray and the normal.
i⁰ = r⁰
where;
- i⁰ is the incident angle
- r⁰ is the angle of reflection
From the diagram given, we can that only one ray has equal angle when compared to the incident ray.
So the ray with reflected angle equal to the incident angle of ray1 is ray 2.