Transcript CPO Science Integrated Physics & Chemistry Chapter 15.2

CPO Science
Integrated Physics &
Chemistry
Chapter 15.2
Seeing an Image
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?
Key Questions
 How does a lens form an
image?
 What factors affect the
image?
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
Tips
Run The Experiment
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.
What did you learn?
 What happened to the refracted ray
as it exits the prism as you change
the angle?
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?
Run The Experiment
 Tips:
—Draw an axis for the lens
—Move the lens straight down the
paper keeping it parallel to the axis.
What did you learn?
 Can you label the key points?
Developing An Experiment
 How does the focal point & focal
length have to do with the image
the lens forms?
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
What did you learn?
 Do the rays cross each other?
 Can you describe this image?
 Answer the questions in part 5 of the
investigations?
Summary
What causes light to bend in a
lens?
What is the focal point & the focal
length?
How is an image formed?