1. If you stands
2.0 m in front of a plane mirror, how far away would you see the image of
yourself?
a. 1.0 m
b. 2.0 m
c. 4.0 m
d. 8.0 m
2. A plane mirror forms an image that is
a. real and upright.
b. virtual and upright.
c. real and upside down.
d. virtual and upside down.
3. A
concave mirror with a radius of 20 cm creates a real image 30 cm from the
mirror. What is the
object distance?
a. 20 cm
b. 15 cm
c. 7.5 cm
d. 5.0 cm
4. A person's face is 30 cm in front of a
concave shaving mirror. If the image is
an erect image 1.5
times as large as
the object, what is the mirror's focal length?
a. 20 cm
b. 50 cm
c. 70 cm
d. 90 cm
5. An object is placed 15 cm from a concave
mirror of focal length 20 cm. The object is 4.0 cm tall.
How tall is the image?
a. 1.0 cm
b. 2.0 cm
c. 8.0 cm
d. 16 cm
6. An object is placed at a concave mirror's
center of curvature. The image produced
by the mirror
is located
a. out beyond the center of curvature.
b. at the center of curvature.
c. between the center of curvature and the focal
point.
d. at the focal point.
7. An object is situated between a concave
mirror's surface and its focal point.
The image formed
in this case is
a. real and inverted.
b. real and erect.
c. virtual and erect.
d. virtual and inverted.
8. An object is 47.5 cm tall. The image is 38.6 cm tall, and 14.8 cm from
the mirror. How far is the
object from
the mirror?
a. 124 cm
b. 47.6 cm
c. 18.2 cm
d. 12.0 cm
9. An object is 5.7 cm from a concave
mirror. The image is 4.7 cm tall, and 10
cm from the mirror.
How tall is the object?
a. 12 cm
b. 11 cm
c. 8.2 cm
d. 2.7 cm
10. An object is 14 cm in front of a convex
mirror. The image is 5.8 cm behind the
mirror. What is
the focal length of
the mirror?
a. -4.1 cm
b. -8.2 cm
c. -9.9
cm
d. -20
cm
11. A convex spherical mirror has a focal
length of -20 cm. An object is placed 10
cm in front of the
mirror on the
mirror's axis. Where is the image
located?
a. 20 cm behind the mirror.
b. 20 cm in front of the mirror.
c. 6.7 cm behind the mirror.
d. 6.7 cm in front of the mirror.
12. Convex spherical mirrors produce images
which
a. are always smaller than the actual object.
b. are always larger than the actual object.
c. are always the same size as the actual
object.
c. could be larger than, smaller than, or the same
size as the actual object, depending on the
placement of the
object.
13. A ray of light, which is traveling in air,
is incident on a glass plate at a 45 degree angle. The angle
of refraction in
the glass
a. is less than 45 degrees.
b. is greater than 45 degrees.
c. is equal to 45 degrees.
d. could be any of the above; it all depends on
the index of refraction of glass.
14. The critical angle for a beam of light
passing from water into air is 48.8 degrees.
This means that
all light rays with
an angle of incidence greater than this angle will be
a. absorbed.
b. totally reflected.
c. partially reflected and partially
transmitted.
d. totally transmitted.
15. A convex lens has focal length f. An object is placed at 2f on the axis. The image formed is
located
a. at 2f.
b. between f and 2f.
c. at f.
d. between the lens and f.
16. A convex lens has a focal length f. An object is placed between f and 2f on the
axis. The image
formed is located
a. at 2f.
b. between f and 2f.
c. at f
d. between the lens and f.
17. A object is placed between a convex lens and its
focal point. The image formed is
a. virtual and erect.
b. virtual and inverted.
c. real and erect.
d. real and inverted.
18. An object is placed 40 cm in front of a 20
cm focal length converging lens. How far
is the image
of this object from
the lens?
a. 40 cm
b. 20 cm
c. 13 cm
d. None
of the above.
19. An object is 12 cm in front of a converging
lens with focal length 4 cm. Where is
the image?
a. 8.0 cm behind the lens
b. 6.0 cm in front of the lens
c. 6.0 cm behind the lens
d. 4.0 cm in front of the lens
20. An object is placed at a distance of 40 cm
from a thin lens. If a virtual images
forms at a distance
of 50 cm from the
lens, on the same side as the object, what is the focal length of the lens?
a. 45 cm
b. 75 cm
c. 90 cm
d. 200 cm
21. An object is placed at a distance of 30 cm
from a thin convex lens. The lens has a
focal length of
10 cm.
What are the values, respectively, of the image distance and lateral
magnification?
a. 15 cm, 2.0
b. 25 cm, 1.0
c. 60 cm, -0.50
d. 15 cm, -0.50
22. A 14 mm tall object is 4.0 mm from a
converging lens. If the image is 4.0 mm
tall, how far is it
from the lens?
a. 14 mm
b. 8.7 mm
c. 1.4 mm
d. 1.1 mm
23. An object is 4.1 cm tall, and 10.3 cm from
a converging lens. The image is virtual
and 6.2 cm tall.
What is the focal length of the lens?
a. 6.8 cm
b. 10 cm
c. 16 cm
d. 30 cm
24. An object is 10.4 cm tall, and 4.8 cm in
front of a diverging lens. The image is
4.0 cm from the lens.
How tall is the image?
a. 13 cm
b. 8.7 cm
c. 5.4 cm
e. 1.8 cm
25. How far from a lens of focal length 50 mm
must the object be placed if it is to form a virtual image
magnified in
size by a factor of three?
a. 33 mm
b. 42 mm
c. 48 mm
d. 54 mm
Answers:
1. c
2. b
3. b
4. d
5. d
6. b
7. c
8. c
9. d
10. c
11. c
12. a
13. a
14. b
15. a
16. d
17. a
18. a
19. c
20. d
21. d
22. d
23. d
24. b
25. a