Thin Lenses (104)
BlackBoard Notes

• Write sections in this order: 4, 1, 2. 3

======================= Photo - Click for a Larger Version =============================

======================= First Board Section =============================

• Examine the properties of lenses:
  • Converging (positive)
  • Diverging (negative)
• Determine location of image on optical bench and by calculation
  • No ray tracing today!

======================= Second Board Section =============================

(Miller's notes for drawing ray diagrams on board: Draw axes first, then rays through the f's, then ray through lens center. Finally, draw lens)

• Measuring focal length, f (converging lens):

 

• Image distance, q:

What if p < f ? Magnifying lens!

======================= Third Board Section =============================

• Measuring f (diverging lens):

• Image distance, q:

 

Eye glasses (near sighted)

======================= Fourth Board Section =============================

• Thin Lens Equation (f = focal length; p = object distance; q = image distance):

©	St. Lawrence University	Department of Physics

Revised: 03 Apr 23

Canton, NY 13617