1. Reflection of Light Definition of Reflection Types of Reflection
Laws of Reflection
Plane Mirrors
Total Internal Reflection

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

3. 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

4. incident ray
normal
reflected ray
mirror

5. 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

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

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

8. Regular Reflection

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

10. Irregular Reflection

11. #1 The angle of incidence equals the angle of reflection.
Laws of Reflection
#1 The angle of incidence equals the angle of reflection.

12. 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.

13. Ray Diagrams for Plane Mirrors

14. Ray Diagrams for Plane Mirrors

15. Ray Diagrams for Plane Mirrors

16. Ray Diagrams for Plane Mirrors
Lateral inversion
Left and right are interchanged !

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

18. Uses of Reflection
Reflectors for bikes and roads

19. Uses of Reflection
Reflectors for photography

20. Uses of Reflection
Rear-view mirrors

21. Uses of Reflection
Medical mirrors
Telescopes

22. In refraction, some light are reflected

23. Total Internal Reflection (TIR)
When a ray does not cross the boundary but is reflected instead

27. Fibre Optics

28. Endoscope