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Physical Science
Chapter 13
Worksheet 1
Name ________________________
Period________________________
Match the definition to the correct word or phrase
____
1. Focal length
A. A lens that is thicker in the middle than at the edges and can form
real or virtual images
B. Flat, smooth mirror that reflects light to form upright, virtual
images
____
2. Concave mirror
____
____
3. Cornea
4. Refracting telescope
C. Uses lenses to gather and focus light from distant objects
D. An image formed by diverging light rays that is perceived by the
brain
____
5. Retina
E. Imaginary straight line that is perpendicular to the surface at the
center of a mirror or lens
____
____
6. Convex lens
7. Convex mirror
____
8. Virtual image
F. Distance from the center of a lens or mirror to the focal point
G. The point on the optical axis of a curved mirror or lens where light
rays that are initially parallel to the optical axis converge after
striking the mirror or lens
H. Instrument that uses two convex lenses to magnify small, close
objects
____
9. Concave lens
I.
An image that appears at a certain location as a result of rays of
light converging at that location
____
10. Focal point
J.
A reflective surface that curves inward and can magnify objects
or create real images
____
11. Optical axis
K. A reflective surface that curves outward away from the viewer,
and forms a reduced, upright, virtual image
____
12. Microscope
L. Uses mirrors and lenses to collect and focus light from distant
objects
____
13. Reflecting telescope
M. Inner lining of the eye that has cells which convert light images
into electric signals for interpretation the brain
____
14. Plane mirror
N. A lens that is thicker at the edges than in the middle; causes light
rays to diverge and forms reduced, upright, virtual images
____
15. Real image
O. Transparent covering on the eyeball through which light enters
the eye
Circle the letter that corresponds to the correct answer
16. Which of the following types of images is not formed by plane mirrors
a. upright
b. life-sized
c. enlarged
d. virtual
17. What object reflects light and curves inward
a. plane mirror
b. concave mirror
c. convex mirror
d. concave lens
18. What type of mirror can be used to form a magnified image
a. convex
b. plane
c. concave
d. transparent
19. What object is used in a headlight, flashlight, or spotlight to create a beam of light?
a. concave lens
b. convex lens
c. concave mirror
d. convex mirror
20. What do lenses do
a. reflect light
b. refract light
c. diffract light
d. interfere with light
21. Which way does a concave lens bend light
a. toward its optical axis
b. toward its center
c. toward its edges
d. toward its focal point
22. What kinds of lenses are most helpful for farsighted people
a. flat lenses
b. convex lenses
c. concave lenses
d. plane lenses
23. Which object is not in a reflecting telescope
a. plane mirror
b. concave mirror
c. convex lens
d. concave lens
24. Which of the following images do light rays never pass through
a. real
b. virtual
c. enlarged
d. reduced
25. Which lens would you use to take a close-up photograph
a. lens with a short focal length
b. lens with a long focal length
c. a small lens
d. wide-angle lens
26. Which best describes image formation by a plane mirror?
a. A real image is formed in front of the mirror
b. A real image is formed behind the mirror
c. A virtual image is formed in front of the mirror
d. A virtual image is formed behind the mirror
Complete the table below
Image Formation by Lenses and Mirrors
Type of Lens or
Mirror
Concave Lens
Convex Lens
Concave mirror
Convex mirror
Position of
Object
All positions of
object
Closer than one
focal length
Type of Image
Virtual, upright, reduced
27.
Between one and
two focal lengths
28.
Farther than two
focal lengths
Real, inverted, reduced
Closer than one
focal length
29. .
Object placed at
focal point
30. .
Farther than two
focal lengths
All positions of
object
31. .
32. .
Answer the following questions
33. What is the difference between a real and virtual image?
34. If you have difficulty reading the whiteboard from the back row, what is most likely your vision
problem? How can it be corrected?
35. What advantages of disadvantages does the Hubble Space Telescope have compared to
telescopes of Earth?