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Integrated Science
Unit 5, Chapter 15
Unit Five: Light and Optics
Chapter 15 Optics
15.1
Seeing an Image
15.2
The Human Eye
15.3
Optical Technology
Chapter 15 Learning Goals

Describe the function of the human eye.

Describe the difference between objects and images.

Describe and demonstrate the formation of an image.

Draw a ray diagram for a lens.

Calculate the magnification of a lens.

Describe the index of refraction and explain how it is applied in the
making of lenses.

Identify the characteristics of reflection.

Draw a reflected ray.

Predict how light will bend when its speed changes.

Understand internal reflection.

Identify uses of fiber optics.
Chapter 15 Vocabulary Terms

angle of incidence
 angle of refraction
 converging
 critical angle
 diverging
 focal length
 focal point
 focus
 image
 incident ray

index of refraction
 lens
 normal
 ray diagrams
 real image
 reflected ray
 refraction
 total internal reflection
 virtual image
15.1 Seeing an Image
Key Question:
What does
magnification
really mean, and
how do you plot a
reflected image?
*Read text section 15.1 AFTER Investigation 15.1
15.1 Seeing an image: Optics
 The
study of how light
behaves is called optics.
 Optics
deals with the
collection and use of light
to create images.
 Lenses,
mirrors, and
prisms are part of the
study of optics.
15.1 Images

Objects are real physical
things that give off or
reflect light rays.

Images are “pictures” of
objects that form where
light rays from the object
meet.
15.1 Optical Systems

Optical systems collect
light rays.

Optical Systems bend
collected light rays to
form images.
15.2 The Human Eye
15.2 Forming an Image
 The
lens of the
eye can change
its shape to focus
at different
distances.
15.2 The Human Eye
Key Question:
How does a lens
form an image?
*Read text section 15.2 BEFORE Investigation 15.2
15.3 Optical Technology

A light pipe traps light by
total internal reflection.

A fiber optic is thin light
pipe that is flexible.

Any light that enters the
fiber outside a certain
angle will be lost.
15.3 Optical Technology
Key Question:
How are optics used
in everyday life?
*Read text section 15.3 BEFORE Investigation 15.3