Mirrors Part 1

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

Multiple Choice

What do you call a flat mirror?

• plane mirror

• convex mirror

• concave mirror

Draw the image then share with class

Multiple Choice

Why it is written in this manner?

• Mirrors in front vehicles invert it upside down

• Mirrors in front vehicles invert it left to right

• Mirrors wont invert

Multiple Choice

True or False: This diagram shows the correct position of the mirrors so that the light hits the target

• True

• False

Multiple Choice

The illustration shows a light ray striking an object.
In the illustration, the light ray striking the object is-

• absorbed
• stopped
• reflected
• refracted

Multiple Choice

If the angle of incidence in the diagram is 80°, the angle of reflection will be:

• 10°

• 100°

• 90°

• 80°

Multiple Choice

An imaginary line that is drawn at a right angle (90 degrees) to a mirror (Green line)

• Reflection Ray

• Normal

• Incidence Ray

• Light Ray

Multiple Choice

The angle between the reflected ray and the normal (labelled Y on the diagram).

• Angle of Incidence

• Angle of Reflection

• Angle of Normal

• Angle of Light

Multiple Choice

The angle between the incident ray and the normal. (X on the diagram)

• Angle of X-Ray

• Angle of Reflection

• Angle of Incidence

• Angle of Normal

Multiple Choice

The ray that bounces off the mirror.

• Angle of Reflection

• Incidience Ray

• Reflected Ray

• Angle of Reflection

Multiple Choice

The ray of light that strikes a mirror

• Reflected Ray

• Incidence Ray

• Angle of Incidence

• Angle of Reflection

Multiple Choice

The angle of incidence is equal to the angle of reflection

• Law of Reflection

• Law of Light

• Incidence Ray

• The Normal

Multiple Choice

Which term describes when light bounces off of a smooth surface?  

• Refraction
• Transmission
• Absorption
• Reflection

Multiple Choice

If the man is 4 m from the mirror, his image is how far from the mirror?

• 2 m

• 4 m

• 8 m