Name:______________________________Class:__________________ Date:__________________
Light and Reflection
Chapter Study Guide
Teacher Notes and Answers
1. 4.07 1016 m
2. a. 3.33 105 s
b. 1.00 104 m
3. 3.84 108 m
4. 3.00 1011 Hz
5. Diffuse reflection: (nonshiny surfaces) table top, floor, walls, car paint, posters (answers will vary)
Specular reflection: metallic surfaces, water, mirrors (answers will vary)
6. a. Check student drawings for accuracy.
b. B is 4 m from A horizontally, C is 2 m below B vertically
c. D is 2 m below A vertically, E coincides with C
d. they will overlap the existing images or objects
7. a. 9.00 cm
b. p = 30.0 cm; q = 12.9 cm; real; inverted; 2.58 cm tall
p = 24.0 cm; q = 14.4 cm; real, inverted; 3.60 cm tall
p = 18.0 cm; q = 18.0 cm; real; inverted; 6.00 cm tall
p = 12.0 cm; q = 36.0 cm; real; inverted; 2.00 cm tall
p = 6.0 cm; q = 18 cm; virtual; upright; 18 cm tall
8. p = 30.0 cm; q = 6.92 cm; virtual; upright; 1.38 cm tall
p = 24.0 cm; q = 6.55 cm; virtual, upright; 1.64 cm tall
p = 18.0 cm; q = 6.00 cm; virtual; upright; 2.00 cm tall
p = 12.0 cm; q = 5.14 cm; virtual; upright; 2.57 cm tall
p = 6.0 cm; q = 3.6 cm; virtual; upright; 3.6 cm tall
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Physics
1
Study Guide
Name:______________________________Class:__________________ Date:__________________
Light and Reflection
Chapter Study Guide
1. Proxima Centauri, the nearest star in our galaxy, is 4.30 light-years away. What is
its distance in meters?
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2. Radio signals emitted from and received by an airplane have a frequency of 3.00
1012 Hz and travel at the speed of light.
a. How long is the delay in each message going from the control tower to a jet
flying at 1.00 104 m of altitude?
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b. What is the wavelength of these signals?
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3. A laser beam is sent to the moon from Earth. The reflected beam is received on
Earth after 2.56 seconds. What is the distance from Earth to the moon?
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4. The background radiation in the universe (believed to come from the Big Bang)
includes microwaves with wavelengths of 0.100 cm. What is the frequency of this
radiation?
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5. List five objects that reflect light diffusely. List three objects that reflect light
specularly for the most part.
Diffuse reflection __________________________________________________
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Specular reflection _________________________________________________
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Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Physics
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Study Guide
Name:______________________________Class:__________________ Date:__________________
Chapter Study Guide continued
6. A mirror door is located next to a large
wall mirror. The door is closed to create a
90° angle with the wall. You stand 2.00
m from the door and 1.00 m from the
wall.
a. On the diagram at right, sketch a topview diagram of the situation at scale.
Label the object (yourself) A.
b. Locate your first image in the mirror on the door. Label it B. Locate B’s image
in the mirror on the wall. Label it C.
c. Locate your first image in the mirror on the wall and its image in the mirror on
the door. Label them D and E.
d. Where will the next images of the images be located?
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7. An object located 36.0 cm from a concave mirror produces a real image located
12.0 cm from the mirror.
a. Find the focal length of this mirror
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b. Find the location, type, and size of the image formed by a 6.00 cm tall object
located 30.0 cm, 24.0 cm, 18.0 cm, 12.0 cm, and 6.00 cm in front of the mirror.
_________________________________________________________________
_________________________________________________________________
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8. The concave mirror in the problem above is replaced by a convex one with the
same curvature. Find the location of the images produced when the object is
located 30.0 cm, 24.0 cm, 18.0 cm, 12.0 cm, and 6.00 cm in front of the mirror.
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_________________________________________________________________
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Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Physics
3
Study Guide