Section 4 & 5: Mirrors and Lenses

What kind of mirror do we use everyday to get ready?

How do eyeglasses help some see better?

Today you will need

Chromebook

INB

Pen/pencil/highlighter

I can demonstrate how a reflection is different based on the type of mirror.

01

Success Criteria

I can identify
the difference between plane, convex, and concave mirror and lens.

I can represent
the direction of
light rays when they hit a
concave,
convex, or plane mirrors and lens.

I can explain
what type of
mirror I use each morning and how eyeglasses help me see more clearly.

02

03

04

Review

Multiple Choice

What happens when light hits an object?

• it passes through the object

• it reflects off the object

• it gets absorbed by the object

• all of these

Multiple Choice

What is the relationship between the size of a shadow and the distance from the light source?

• The shadow gets larger as the distance from the source increases

• The shadow gets smaller as the distance from the light sources increases

• The size of the shadow is not affected by the distance from the light source

• The size of the shadow is random and unpredictable.

Labelling

Label the diagram to show the Law of Reflection

Drag labels to their correct position on the image

Normal

Medium or object

Reflection Ray

Incident Ray

Multiple Choice

Why does a pencil appear bent or broken when placed in water?

• the light is reflecting

• the light is refracting

• the water is distorted

• the water absorbs the light rays

What is a mirror?

A mirror is an object that reflects light to form an image.

THREE TYPES OF MIRRORS

PLANE

Flat, reflective surface
Reverse left and right
(writing looks backwards)

Ex. Bathroom mirror

CONVEX

Mirror curves out
(toward the object)

Light rays come together

Ex. Flashlight

CONCAVE

Goes inward

Light rays spread apart

Reverses image vertically

Ex. side view mirrors

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Match

Match the following

Concave

Convex

Plane

• Concave

• Convex

• Plane

Multiple Choice

Why is the word "Ambulance" written backwards on the front of an ambulance?

• There is no specific reason

• To make it easier to read in a rearview mirror

• To make it look more stylish

• To confuse people

What is a lens?

A lens is a curved piece of glass or transparent object that can bend light.

Light can be refracted using a lens.

TWO TYPES OF LENSES

CONVEX

Focuses
light
inwards

CONCAVE

Spreads light outwards

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A concave lens corrects short-sightedness.

Nearsighted
CONCAVE LENS

A person who is nearsighted can see objects near to
them clearly, but objects farther away are blurry.

Farsighted
CONVEX LENS

A convex lens corrects farsightedness.

A person who is farsighted can see objects far from them clearly, but objects close are blurry.

Labelling

Label the parts of the eye

Drag labels to their correct position on the image

Optic nerve

Lens

cornea

Retina

Multiple Choice

What is the purpose of a convex lens in front of your eyes?

• To block out excess light

• There is no specific purpose

• To focus incoming light and give us clear vision

• To create a magnifying effect

Multiple Choice

A flat, smooth mirror best describes which of the following?

• Plane

• Convex

• Concave

Multiple Choice

A mirror with a surface that curves inward best describes which of the following?

• Plane

• Convex

• Concave

Multiple Choice

The image formed by a plane mirror is __________.

• real and upright

• virtual and upright

• real and reversed

• virtual and inverted

Multiple Choice

Which mirror can form an enlarged image?

• Plane

• Convex

• Concave

Dropdown

A ​

Select answer

helps to focus light rays to form images.​

Dropdown

A lens thinner in the middle than at the edges best describes a ​

Select answer

Now you try…

Digital INB Pages 5 & 6

When finished work on your Waves Study Plan

or Waves Practice Gimkit