1. In our activity today we will learn: About the laws of reflection. How to draw ray diagrams to show the reflection of light for plane mirrors. SUCCESS CRITERIA I will be successful if I can Recognize the incident and reflection rays, incident and reflection angles, and normal on a diagram. Complete the activity with my group members, and be able to answer the questions related to the activity.

2. Quick Review... Incident ray Reflection ray Reflecting Surface 4?4? 5?5? 2?2?

3. ACTIVITY 4.11: Page 322 of textbook How Light Reflects In groups of 3. With your group members, decide who will be the MATERIAL manager, the TASK manager, and the SAFETY officer. Every person must have a role. Material manager: responsible for getting all the material and for cleaning up. Task manager: responsible for becoming familiar with the procedure, and knowing what the group members have to do (step by step). Safety officer and recorder: responsible for any safety issues, and for recording the measurements in the table for their group. What You Need: Textbook Plane (flat) mirror Ray box with single slit Ruler, protractor, and pencil White paper Every student will submit their results with their answers to “What Did You Find Out?” at the end of class. On your results sheet, please write down the names of your group members with their responsibilities.

4. 1.The angle of reflection (r) is equal to the angle of incidence (i). 2.The reflected ray and the incident ray are on opposite sides of the normal. 3.The incident ray, the reflected ray, and the normal always lie on the same plane (flat surface). LAWS OF REFLECTION Incident ray Reflection ray Flat Reflecting Surface