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

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Presentation on theme: "Reflection of Light The bouncing off of light as it hits a surface."— Presentation transcript:

1 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 –The source of light Image –The picture of the object that is formed from the reflected rays

7 Important Terms object image

8 Important Terms Incident Ray –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 mirror normal incident ray reflected ray

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

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

12 Investigation

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

14 #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 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

18

19 Ray Diagrams for Plane Mirrors Same Size

20 Ray Diagrams for Plane Mirrors

21 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

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 mirrorsTelescopes


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