Ray diagrams

1
Ray diagrams

• Same rays as we drew for mirrors
• Rays will always go through the mirror (not
  reflected) but will be somehow bent (refracted)

2
Useful Definitions

• Lens a transparent object that refracts light
  rays, causing them to converge or diverge to
  create an image.
• Big difference with mirrors
• Real is on the right side of the lens. Why?
• side of mirror is ride side
• - side of mirror is left side

3
Converging lens 1
C
Real, Inverted, Reduced Image
4
Converging lens 2
C
Real, Inverted, True (Same size) Image
5
Converging lens 3
C
Real, Inverted, Enlarged Image
6
Converging lens 4
C
Virtual, Upright, Enlarged Image
7
For converging lenses

• f is positive
• p is positive
• q is positive for real images and negative for
  virtual images
• M is negative for real images and positive for
  virtual images
• hi is negative for real images and positive for
  virtual images

8
Diverging lens
C
Virtual, Upright, Reduced Image
9
For diverging lenses

• f is negative
• p is positive
• q is negative
• M is positive and lt 1
• hi is positive and lt ho