Page 90 - Science Course 3 (Book 2)

Ref ections, Mirrors, and Lenses Mo10-L6a: How Do Ref ections and
Mirrors Work?
Lesson 6

Because the light rays travel the same way relative to
each other before and after ref ection, the ref ected
light rays form a sharp image.
In this topic, you will learn the following
lessons: Diffuse ref ection occurs when light rays traveling in
Mo.10–L6a: How Do Ref ections and Mirrors the same direction hit a rough surface at different
Work? angles, ref ecting light rays in many different
Mo.10–L6b: What are the Types of Lenses? directions.

Mo.10–L6c: How Does the Human Eye Work?

How Do Ref ections and Mirrors
Mo10–L6a
Work?
KEY CONCEPTS: You don’t see a clear image when diffuse ref ection
1. What is the difference between regular and occurs.
diffuse ref ection?
2. What types of images are formed by mirrors? Light waves always obey the law of ref ection,
whether the surface is smooth or rough.

Vocabulary A-Z Key Concept
Let us learn some vocabulary
How Do Ref ections and Mirrors Work?

mirror Contrast regular and diffuse ref ection.

any ref ecting surface that forms an image by
regular ref ection.

Let’s Begin

Why are some surfaces mirrors?

Regular ref ection occurs when a smooth surface
ref ects light rays traveling in the same direction at
the same angle.

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