1. Physics

2. PHS 5041 Optics Plane Mirrors

3. PHS 5041 Optics Plane Mirrors
Reflection of Light: Process that causes light to bounce off objects in its path

4. PHS 5041 Optics Plane Mirrors
Diffuse reflection: Occurs when light strikes an irregular surface. Light rays get reflected in ALL directions. Does not produce an image on reflecting surface
Specular (regular) reflection: Occurs when light strikes a smooth (polished) surface. Light rays get reflected in ONE direction. Produces an image on reflecting surface

5. PHS 5041 Optics Plane Mirrors

6. PHS 5041 Optics Plane Mirrors
Laws of Reflection:
The angle of the incident ray is equal to that of the reflected ray.
The incident ray, the reflected ray and the normal (N) lie in the same plane

7. PHS 5041 Optics Plane Mirrors

8. PHS 5041 Optics Plane Mirrors
Plane mirrors produce images that, with respect to the object, are: _Symmetrical with respect to the mirror _Same size and position of the object _Virtual images (because they cannot be formed on a screen) *Pinhole cameras produce real images

9. PHS 5041 Optics Plane Mirrors

10. PHS 5041 Optics Plane Mirrors
Practice

11. PHS 5041 Optics Plane Mirrors
Practice

12. PHS 5041 Optics Plane Mirrors
Reflection (plane mirror) and Vision _light rays from the object get reflected by the mirror and reach our eyes _image appears behind the mirror

13. PHS 5041 Optics Plane Mirrors
Virtual images _cannot be produced on a screen _are located at the intersection of the extensions of reflected rays

14. PHS 5041 Optics Plane Mirrors

15. PHS 5041 Optics Plane Mirrors
Reversibility of Reflection

16. PHS 5041 Optics Plane Mirrors
Reversibility of Reflection

17. PHS 5041 Optics Plane Mirrors
Field of vision To be able to see an image in a mirror, we must be able to connect the image to the eye using a straight line *Reversibility of reflection indicates that our eye will also be seen by the object generating said image

18. PHS 5041 Optics Plane Mirrors
Field of vision All the space in front of a mirror which we are able to see from a given vantage point Can also be determined using the image of the observer

19. PHS 5041 Optics Plane Mirrors
How long? In order to be able to produce the complete image of a person (head-to-toe), a mirror must be HALF of the height of a person

20. PHS 5041 Optics Plane Mirrors

21. PHS 5041 Optics Plane Mirrors
Applications

22. PHS 5041 Optics Plane Mirrors
Applications

23. PHS 5041 Optics Plane Mirrors
Applications

24. PHS 5041 Optics Plane Mirrors
Applications

25. PHS 5041 Optics Plane Mirrors
How many images can be produced (N)? (Formula that relates N and the angle between two mirrors?)
Angle between mirrors (θ)
Number of reflection (N) 30 11 45 7 60 5 90 3
180 1
N = (360 / θ) - 1