MIRRORS AND LENSES

1. RUBRICS FOR REPORTING
CONTENT: 15 points
PRESENTATION: 15 points
MATERIALS (creativity & clarity): 10 points
ASSESSMENT: 10 points

2. Lights: Mirrors and Lenses

4. What is Reflection?

5. Reflection is the bouncing off
of light rays when it hits a
surface like a plane mirror.

6. Activity: Angle of Incidence vs Angle of Reflection
Important Terms!
Incident Ray - ray of light approaching the mirror represented by
an arrow approaching an optical element like mirrors
Reflected Ray - ray of light which leaves the mirror and is
represented by and arrow pointing away from the mirror.
Normal Line - an imaginary line that can be drawn perpendicular to
the surface of the mirror at the point of incidence where the ray
strikes the mirror.

7. Angle of Incidence – the angle between the incident ray and the normal line
Angle of Reflection – the angle between the reflected ray and the normal line

8. DEMO ACTIVITY

9. GROUP ACTIVITY:
MIRROR LEFT- RIGHT REVERSAL

10. Demo Activity: Who wants to be a millionaire?

12. IMAGES FORMED BY PLANE MIRRORS
Reflection
- bouncing of light rays when it hits a surface like mirror
CHARACTERISTICS IS DESCRIBED IN TERMS OF:
IMAGE
ORIENTATION
LOCATION
SIZE

13. IMAGE
Virtual image - formed when an outgoing ray from an
object always diverge (move apart)
ORIENTATION
Erect, laterally inverted
Lateral inversion- phenomenon wherein what is left on
the object appears as right on the image and vice
versa. This is due to the direction that light follows
when it strikes a reflecting surface like mirror.

14. LOCATION
same distance from the mirror as the object
distance
SIZE
same size as the object

15. Types of Reflection
Specular/ Regular Reflection
-the reflection of light on smooth surfaces such as mirrors or
calm body of waters
Diffuse/Irregular Reflection
-the reflection of light on rough surfaces such as clothing, paper
and asphalt roadway

16. IMAGES FORMED BY CURVED MIRRORS