Law+of+Reflection+Lab

Reflection in Fiber Optics Video Video http://ca.pbslearningmedia.org/resource/lsps07.sci.phys.energy.lightreflect/light-and-the-law-of-reflection/   . Objective: To understand how light is reflected.
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 * Law of Reflection Lab **

Problem: How does the angle of incidence compare to the angle of reflection?

Research:

Define Angle of Incidence-

Define Angle of Reflection-

Hypothesis (circle your choice): The angle of incidence is (larger) (equal) (smaller) compared to the angle of reflection.

Materials: textbook, pencil, 1 sheet of paper, mirror, protractor, 4 nails, cardboard, & light in the room (optional: laser pointer) . . Procedures:

1. Draw a line down the center of a sheet of paper.

2. Lay this paper on top of the cardboard.

3. Stand the mirror on the line.

4. Stick 2 nails in front of the mirror on the right side by poking them into the cardboard. . . Mirror Line
 * [[image:ReflectLab1.png]] ||  ||.

Nail 1

Nail 2 || 5. Look into the mirror and move your head until the reflected image shows the 2 nails lined up. Put 2 more nails on the left side of the paper so they line up with the mirror images.
 * [[image:ReflectLab2.png]] ||  ||   ||

6. Remove the nails from the right side and use the protractor edge to draw a line through the 2 nail holes. Label this line “incoming”. 7. Use the protractor to measure the angle of incidence. 8. Remove the nails from the left side and use your protractor edge to draw a line through the nail holes. Label this line “reflection”. 9. Use the protractor to measure the angle of reflection. 10. Record the angle of incidence and angle of reflection in the observations data table. 11. Conduct two more trials of procedures 4-10. Place the right side nails in different places and angles for each trial. ..
 * [[image:ReflectLab3.png]] ||  ||   ||
 * [[image:ReflectLab4.png]] ||  ||   ||
 * [[image:ReflectLab5.png]] ||  ||   ||
 * [[image:ReflectLab6.png]] ||  ||   ||

. . Conclusion & Analysis:
 * ** Observations: ** ||
 * ** Trials ** ||  ** ...Angle of Incidence... **  ||  ** ...Angle of Reflection... **  ||
 * ** 1 ** ||   ||   ||
 * ** 2 ** ||   ||   ||
 * ** 3 ** ||   ||   ||

1. How did the two angle measurements compare in trial 1?

2. How did the two angle measurements compare in trial 2?

3. How did the two angle measurements compare in trial 3?

4. What does the law of reflection say about how the angle measurements should compare?

5. What could be a possible explanation if your angle measurements don’t follow the law of reflection?

6. Does the hypothesis you completed follow the law of reflection? Justify your answer.

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