G7 Unit 4: Optics
Lesson 12: Optics Review
Starter: Unit Checklist
Go over the first 5 rows of your unit checklist (behind the unit outline in your notes). The first 5
rows will be on your test.
Curved Mirrors
Last class, your homework was to practice predicting images for curved mirrors. Predict the
images formed in the following diagrams by​ drawing the rays​ and ​describing the image
(LOST)​. Can you predict the images without looking at the rules?
Concave mirrors:
Convex mirrors:
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G7 Unit 4: Optics
Ray Diagrams Summary
Convex Lenses
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G7 Unit 4: Optics
Concave Lenses
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G7 Unit 4: Optics
Convex Mirrors
Concave Mirrors
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G7 Unit 4: Optics
Workbook pages
WB pg 117-118 (Q1-17)
WB pg 124-125 (Q1-14)
WB pg 129 - 130
WB pg 131-133 (Q1-17)
WB pg 140-141 (Q1-12)
Additional Practice Questions
1. Shaving mirrors produce​ upright​, ​magnified​ images.
A. What type of mirror is used in the production of these
shaving mirrors?
B. Place​ an object on the correct side of the mirror and
draw ​a ray diagram to show how this type of image is
formed.
2. A refracting telescope works by using a lens to direct rays towards the center of the telescope
as shown in the diagram below. What type of lens must the objective lens be?
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G7 Unit 4: Optics
3. Magnifying glasses produce​ upright​, ​magnified​ images.
What type of lens is used in the production of magnifying glasses? ​Choose​ the correct lens
and ​draw ​a ray diagram to show how this type of image is formed. ​Describe​ the image formed.
4. A light ray reflects off a ​plane mirror​ at a 55° angle. Draw a diagram to show the ray of light
before and after the reflection. Label the diagram.
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G7 Unit 4: Optics
5. Using the diagram below to help you, explain why the man thinks the object is not as deep as
it actually is.
6. Calculate the frequency for the following waves:
7. What happens to the ​amplitude ​and f​ requency ​as the wavelength of a wave decreases?
8.Why does a yellow shirt look yellow in the sunlight?
9. Why does a yellow laser look yellow?
10. Why is a rainbow formed when light is passed through a prism?
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