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Reflecting Light Off a Plane Mirror Lab Questions and Answers

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Questions
A. How did the angle of incidence compare with the angle of reflection?
B. In trial 5, you aimed the incident ray directly along the normal. Describe the path of the incident and reflected rays for this special case.
C. Where might errors occur in this activity?
D. How would these errors affect your conclusion?
E. Billiards is a game that makes use of reflection (Figure 2). How could the results of this activity help you in such a game?
F. What other sports or activities make use of the reflection rule that you discovered in this activity?
Answers
a. The angle of incidence (the angle between the light emitted from a source and the normal) and the angle of reflection (the angle between the light that bounces from the surface and the normal) have the same angle. This is because a reflection coming from a plane mirror is usually equivalent to the object it is reflecting; this means that the angle in which the incident ray hits the mirror will be the same angle as the reflected ray.
b. When the light was directed to the mirror at the same angle as the normal, the incident ray travelled straight along the normal line towards the mirror and as it hit the mirror it made the reflected ray travel straight along the normal line away from the mirror and towards the light source.
c. There are places where errors could've occurred in this activity; first, when the light was aimed at the plane mirror the spot in which the incident ray had to hit was the normal end of the mirror but in some cases one angle could be right on the normal and other angles a bit off. The tracing of the line which is created by the rays might not always be precise which can also alter a bit the final result. Also if the mirror was moved at all during the time that the experiment was performed.
d. These errors can affect the conclusion by affecting the measurements and could lead to

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