Summary

• Spherical refraction
• Thin lenses
• Gaussian & Newtonian systems

• Thin lenses review
• In-class 5.16
• Thin lens (and mirror) applet
• Negative lens example
• Lens activity sheet
• Multiple lenses
• In-class S36.57




• Lens power: diopters
• Hints on homework
• 5.13 - take one surface at a time
• 5.28 - take ratio of focal lengths using eq. 5.18 p. 159
  Note: n_lm = n_l / n_m
• Demo for 5.32 - two lens positions