* A laser pointer

* A mirror

* A piece of paper

* A protractor

Procedure:

1. Place the mirror on a flat surface.

2. Shine the laser pointer at the mirror so that the reflected ray hits the piece of paper.

3. Trace the path of the incident ray, the reflected ray, and the normal at the point of incidence on the paper.

4. Use the protractor to measure the angle between the incident ray and the normal.

5. Use the protractor to measure the angle between the reflected ray and the normal.

Observations:

* The incident ray, the reflected ray, and the normal at the point of incidence all lie in the same plane.

* The angle between the incident ray and the normal is equal to the angle between the reflected ray and the normal.

Conclusion:

The incident ray, reflected ray, and normal at the point of incidence all lie in the same plane. This is consistent with the law of reflection, which states that the angle of incidence is equal to the angle of reflection.