Section 4 & 5: Mirrors and Lenses
Presentation
•
Science
•
8th Grade
•
Practice Problem
•
Medium
+6
Standards-aligned
Christiane Henderson
Used 10+ times
FREE Resource
23 Slides • 14 Questions
1
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
2
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
3
4
5
Review
6
7
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
8
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.
9
Labelling
Label the diagram to show the Law of Reflection
Reflection Ray
Normal
Incident Ray
Medium or object
10
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
11
12
What is a mirror?
A mirror is an object that reflects light to form an image.
13
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
14
15
16
Match
Match the following
Concave
Convex
Plane
Concave
Convex
Plane
17
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
18
19
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.
20
21
TWO TYPES OF LENSES
CONVEX
Focuses
light
inwards
CONCAVE
Spreads light outwards
22
23
24
25
26
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.
27
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.
28
Labelling
Label the parts of the eye
cornea
Lens
Optic nerve
Retina
29
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
30
31
Multiple Choice
A flat, smooth mirror best describes which of the following?
Plane
Convex
Concave
32
Multiple Choice
A mirror with a surface that curves inward best describes which of the following?
Plane
Convex
Concave
33
Multiple Choice
The image formed by a plane mirror is __________.
real and upright
virtual and upright
real and reversed
virtual and inverted
34
Multiple Choice
Which mirror can form an enlarged image?
Plane
Convex
Concave
35
Dropdown
36
Dropdown
37
Now you try…
Digital INB Pages 5 & 6
When finished work on your Waves Study Plan
or Waves Practice Gimkit
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
Show answer
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