Thin Lenses (104)
BlackBoard Notes

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

======================= For better spacing than my photo, write in the following order: Section 1, Section 4, Section 2, Section 3 =============================

Note: The image above uses s and s′ for object and image distances.
Since the notation changes with the textbook used, here's the previous image using p and q.

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

• Examine the properties of lenses:
  • Converging (positive)
  • Diverging (negative)
• Determine location of image on optical bench and by calculation

======================= 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):

 

• Object (s) and Image (s′) distances:

What if s (or p) < f ? Magnifying lens!

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

• Measuring f (diverging lens):

• Object (s) and Image (s′) distances:

 

Eye glasses (near sighted)

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

• Thin Lens Equation (f = focal length; s = object distance; s′= image distance): (Write the version corresponding with the notation used)

©	St. Lawrence University	Department of Physics

Revised: 14 Jul 26

Canton, NY 13617