Physics AP - Law of Reflection (#24)

Background:
The law of reflection states that the angle of incident is equal to
the angle of reflection.  (i) = (r).  The light ray comes in and
reflects off a surface when it does this the Normal is created and on
the other side of the Normal is the reflected ray, and those two
angles should be equal to each other.

Problem:
To find the angle of incident and the angle of reflection, measure
the two and see if they are equal.
 
Materials:
Piece of a mirror, protractor, ruler, paper and pencil.

Procedure:
1. Place the mirror in the center on the paper and draw a line in
   front of the mirror.
2. Then draw a point P on the paper.
3. Now get down to eye level and with a ruler or the non-reflective
   side of another mirror draw a line to the reflection of point P in
   the mirror.
4. Repeat step number 3 until you get two or three good lines.
5. Once you have that with a ruler continue the line until you reach
   the line in front of the mirror, and then continue the line as a
   dotted line after the line in front of the mirror, and draw a dot
   where they all cross, that is the reflected point P behind the
   mirror.
6. After that draw a line connecting all the incident rays from the
   line in front of the mirror to the point P on the paper with a
   dotted line, the dotted lines are the reflected rays.
7. Now draw perpendicular line in between the incident rays and the
   reflected ray that is the Normal.
8. Then measure the incident angle and the reflected angle to see if
   the two are equal.

Data:
Angle of Incident (i)       42°     53°
Angle of Refraction (r)     42°     48°

Analysis/Conclusion:
The conclusion I made from this lab is law of reflection is correct
the angle of incident does equal the angle of reflection.  The only
reason way that was not true in the second line is because of human
error, otherwise it would have been the same result as the first
line.