The Physics Classroom Tutorial: Lenses
Name_____________________
PROCEDURE:
1. Go to the following website http://www.glenbrook.k12.il.us/GBSSCI/PHYS/CLASS/BBoard.html
2. Click on the link “Refraction and the ray model of light”
3. Scroll down until you are at “Lesson 5: Image Formation by Lenses” and click the appropriate link for each
section of the activity below
A. Click on the link: “The anatomy of a lens”
1. What is a lens?
2.
What is the difference between a converging and a diverging lens? Draw a picture of each lens.
3. Draw a diagram of a double convex lens, labeling the vertical axis, principal axis, focal point, and focal length.
B. Click on the link: “Refraction of a lens”
1. State the 3 rules of refraction for a converging lens and draw a diagram demonstrating that rule.
2.
State the three rules of refraction for a diverging lens and make a diagram demonstrating each rule.
D. Click on the link under Converging Lenses “Ray Diagrams”
1. Read through the tutorial on how to construct ray diagrams then construct ray diagrams for the following 5
cases:





Case 1: the object is located beyond the two times the length of the focal point
Case 2: the object is located two times the length of the focal point
Case 3: the object is located between the 2F point and the focal point (F)
Case 4: the object is located at the focal point (F)
Case 5: the object is located in front of the focal point (F)
Check your answers by clicking the link “Object-image relations” under converging lenses.
E. Diverging Lenses
1. Read through the rules for drawing ray diagrams for diverging lenses and complete the ray diagrams on the for the
following diverging lenses: