1. Science 8 – Mirrors and Lenses ANSWERS
Chapter 11 - Review
Science 8 – Mirrors and Lenses
ANSWERS

2. What are these mirrors called?B
Concave C
Convex A
Plane

3. How would the incident ray reflect off a plane mirror. Draw it
How would the incident ray reflect off a plane mirror? Draw it. Label any rays and angles

4. What is the name of the point where the incident ray hits the reflecting surface?
Point of incidence

5. What are the two types of reflection?
Specular reflection
Diffuse reflection

6. What is the difference between diffuse reflection and specular reflection?
Diffuse reflection: The light rays reflect off a rough surface in all different directions and no image is formed.
Specular reflection: The light rays reflect off a smooth surface and an image is formed.

7. Which of these would be specular reflection
Which of these would be specular reflection? Which would be diffuse reflection?
Light reflecting off a calm lake - SPECULAR
Light reflecting off a painted wall - DIFFUSE
Light reflecting off aluminum foil - DIFFUSE
Light reflecting off a shiny metal - SPECULAR

8. What are the two laws of reflection?
The angle of incidence equals the angle of reflection.
2) The incident ray, normal, and reflected ray all lie in the same plane.

9. What is the difference between a real and virtual image?
A real image can be placed on a screen, but a virtual image cannot.

10. What are the two possible attitudes of an image?
Upright
Inverted

11. What are the shapes of a concave mirror and a convex mirror?

12. What happens to light rays that hit a concave mirror?
They converge

13. What happens to light rays that hit a convex mirror?
They diverge

14. What is the point where light rays converge?
Focal point

15. Draw the image of the ray diagram

16. For the ray diagram, what is the size, attitude and type?
Black arrow = object
Red arrow = image
SIZE: smaller than the object
ATTITUDE: inverted
TYPE: real

17. For the ray diagram, what is the size, attitude and type?
Black arrow = object
Red arrow = image
SIZE: larger than the object
ATTITUDE: inverted
TYPE: real

18. For the ray diagram, what is the size, attitude and type?
Black arrow = object
Blue arrow = image
SIZE: smaller than the object
ATTITUDE: upright
TYPE: virtual

19. What is the line through the centre of a mirror called?
Normal OR
Principal axis

20. Which type of mirror will magnify an object
Which type of mirror will magnify an object? (magnify = make it look larger)
Concave

21. Complete the table Plane Mirror
Concave Mirror (closer than focal point)
Concave Mirror
(farther than focal point)
Convex Mirror
Size of image
Same as object
Larger than the object
Smaller than the object
Attitude of image
Upright
Inverted
Location of image
Behind the mirror
In front of the mirror
Type of image
Virtual
Real

22. What happens as light travels from air to water?
It refracts (bends)

23. What do concave and convex lenses look like?

24. Draw and describe what happens to light rays that pass through a concave lens.
Diverge

25. Draw and describe what happens to light rays that pass through a concave lens.
Converge