1. The bouncing off of light as it hits a surface
Reflection of Light
The bouncing off of light as it hits a surface

2. Types of Reflection Regular Reflection a.k.a. specular reflection
When parallel rays are reflected parallel
Reflecting surface is smooth

3. Regular Reflection

4. Types of Reflection Irregular Reflection a.k.a. diffuse reflection
When parallel rays are reflected in different directions
Reflecting surface is not perfectly smooth

5. Irregular Reflection

6. Important Terms Object Image The source of light
The picture of the object that is formed from the reflected rays

7. Important Terms
image
object

8. Important Terms Incident Ray Reflected Ray Normal
Light ray that hits a surface
Reflected Ray
Light ray that bounces off the surface
Normal
Line that is perpendicular to the reflecting surface

9. incident ray
normal
reflected ray
mirror

10. Important Terms Angle of incidence Angle of reflection
Angle between the normal and the incident ray
Angle of reflection
Angle between the normal and the reflected ray

11. incident ray
Angle of incidence
normal
Angle of reflection
reflected ray
mirror

12. Investigation

13. #1 The angle of incidence equals the angle of reflection.
Laws of Reflection #1
The angle of incidence
equals
the angle of reflection.

14. Laws of Reflection
#2 The incident ray, the reflected ray and normal all lie in the same plane.
This means they can all be drawn on a flat sheet of paper.

15. Ray Diagrams for Plane Mirrors
Virtual Image

16. Virtual Image
Image formed by rays which seem to come from it but do not pass through it
Cannot be produced on a screen

17. Ray Diagrams for Plane Mirrors
Same Distance

19. Ray Diagrams for Plane Mirrors
Same Size

20. Ray Diagrams for Plane Mirrors

21. Ray Diagrams for Plane Mirrors
Laterally inverted
Left and right are interchanged !

22. Lateral Inversion
When left and right are interchanged

23. Properties of the Image
Virtual
Object distance equals image distance
Same size
Laterally inverted

24. Seeing and Ray Diagrams

25. Seeing and Ray Diagrams

26. Ray Diagrams for Plane Mirrors
When the eye is above the object

27. Ray Diagrams for Plane Mirrors
When the eye is behind the object

28. Ray Diagrams for Plane Mirrors
When the eye is in front of the object

29. Ray Diagrams for Plane Mirrors

30. Uses of Reflection
Reflectors for bikes and roads

31. Uses of Reflection
Reflectors for photography

32. Uses of Reflection
Rear-view mirrors

33. Uses of Reflection
Medical mirrors
Telescopes