Reflection and Mirrors 7.P.10.2

Learning Objectives

I can identify two kinds of reflections.

I can describe the types of images produced by plane, concave, and convex mirrors.

There are 2 ways in which a surface can reflect light: Regular Reflection and Diffuse Reflection.

• Regular Reflection: occurs when parallel rays of light hit a smooth surface. All rays reflect at the same angle and produce a clear image.

• Diffuse Reflection: occurs when parallel rays of light hit an uneven surface and reflect at diferent angles producing an unclear image.

• Top Image: Regular Reflection

• Bottom Image: Diffuse Reflection

Multiple Choice

What type of reflection will this image produce?

• Regular Reflection

• Diffuse Reflection

What is an image?

• An Image is a copy of the object formed by reflected or refracted light rays.

• There are two types of Images: Virtual and Real

Virtual Images:

• Virtual images are right side up

• Virtual images have the left and right side reversed.

• Virtual images form where light seems to come from (like behind the mirror)

• Virtual images cannot be projected onto a screen

Real Images

• Real images are upside down

• Real images form at the focal point where light rays meet

• Real images can be projected onto a screen

Multiple Choice

What type of image is upside down?

• real

• virtual

Multiple Choice

What type of image can be projected onto a screen?

• real

• virtual

Multiple Choice

Which type of image is right side up but left and right are reversed?

• real

• virtual

Types of Mirrors

There are three types of mirrors that we will discuss: Plane, Concave, and Convex.

Plane Mirrors

Flat mirrors like the one you have in your bathroom. Creates an image that is:

Virtual and Same Size as the object

Concave Mirrors

• Curved (like the inside of a spoon)

• Real or Virtual Images

• (Virtual Image when object is between the focal point and the mirror)

• (Real Image when object is beyond the focal point)

• Size can be larger, smaller, or same (the closer to the focal point the larger it will appear)

Convex Mirrors

• virtual image smaller than the object

• advantage is that it allows you to see a larger area but disadvantage is the image is reduced in size.

• Used in driver side mirrors and on ceilings in stores for security.

Overview

• There are two types of reflections: Regular and Diffuse

• There are three types of mirrors (Plane, Concave, and Convex)

• These mirrors can produce two types of images: Real or Virtual

• Virtual Images are right side up

• Real Images are upside down

Multiple Choice

Now I get it! There are two types of reflections: __________ and ____________

• Diffuse and Regular

• Real and Virtual

Multiple Choice

An ___________ is a copy of an object formed by the reflected or refracted rays of light.

• Image

• Convex

• concave

• plane

Multiple Choice

A ___________ mirror can produce both real and virtual images.

• plane

• concave

• convex

Multiple Choice

What kind of image does a convex mirror produce?

• real but smaller

• virtual but smaller

Multiple Choice

What kind of image does a plane mirror produce?

• real and same size

• virtual and same size