Teacher Resources

1
Teacher Resources

• Laboratory Black line Masters
• Electronic Book
• Skill Sheets

2
Chapter 15.2Seeing an Image

• CPO Science
• Integrated Physics Chemistry

3
Developing A Model

• How does your eye work?
• Lenses
• How does light travel through a lens?
• Does light travel unaffected through glass?

• How does a lens form an image?

4
Key Questions

• How does a lens form an image?
• What factors affect the image?

5
Developing An Experiment

• This experiment requires you to trace the light
  ray from the laser
• What material will we need?
• Read the procedure in the Investigation Manual
  for part 1

6
Run The Experiment

• Tips
• Make sure to aim the laser as shown in the manual.

• Draw the ray from several angles. Make sure the
  ray exits the right hand side.
• It may be easier to draw dashes first then
  connect them later using a straight edge.

7
What did you learn?

• What happened to the refracted ray as it exits
  the prism as you change the angle?

8
Developing An Experiment

• Will the light wave behave the same way in a lens
  as in the prism because they are both glass?
• Will the shape of the lens affect the light?

9
Run The Experiment

• Tips
• Draw an axis for the lens
• Move the lens straight down the paper keeping it
  parallel to the axis.

10
What did you learn?

• Can you label the key points?

11
Developing An Experiment

• How does the focal point focal length have to
  do with the image the lens forms?

12
Run The Experiment

• Tips
• Draw an axis for the lens.
• Draw 2 rays as if they came from the tip of the
  arrow.
• Aim the laser parallel to the axis for the 1st
  ray and the 2nd ray through the center of the
  lens

13
What did you learn?

• Do the rays cross each other?
• Can you describe this image?
• Answer the questions in part 5 of the
  investigations?

14
Summary

• What causes light to bend in a lens?
• What is the focal point the focal length?
• How is an image formed?