13. At 0.708 cm in front of the reflecting surface. Image is vir-
tual, upright, and diminished.
15. 7.90 mm
17. (a) a concave mirror with radius of curvature 2.08 m
(b) 1.25 m from the object
19. (a) 25.6 m (b) 0.058 7 rad (c) 2.51 m (d) 0.023 9 rad
(e) 62.8 m from your eyes
21. 38.2 cm below the top surface of the ice
23. 8.57 cm
25. (a) 45.0 cm (b) $ 90.0 cm (c) $ 6.00 cm
27. 1.50 cm/s
29. (a) 16.4 cm (b) 16.4 cm
31. (a) 650 cm from the lens on the opposite side from the
object; real, inverted, enlarged (b) 600 cm from the
lens on the same side as the object; virtual, upright,
enlarged
33. 2.84 cm
37. (a) $ 12.3 cm, to the left of the lens (b) 0.615
(c)
69. 1.50 m in front of the mirror; 1.40 cm (inverted)
71. (a) 30.0 cm and 120 cm (b) 24.0 cm (c) real, inverted,
diminished with M % $ 0.250
73. $ 75.0
75. (a) 44.6 diopters (b) 3.03 diopters
77. (a) 20.0 cm to the right of the second lens, $ 6.00
(b) inverted (c) 6.67 cm to the right of the second lens,
$
2.00, inverted
CHAPTER 37
1. 1.58 cm
3. (a) 55.7 m (b) 124 m
5. 1.54 mm
7. (a) 2.62 mm (b) 2.62 mm
9. 11.3 m
11. (a) 10.0 m (b) 516 m (c) Only the runway centerline is
a maximum for the interference patterns for both
frequencies. If the frequencies were related by a ratio of
small integers k/!, the plane could by mistake fly along the
kth side maximum of one signal where it coincides with
the !th side maximum of the other.
13. (a) 13.2 rad (b) 6.28 rad (c) 0.012 7 degree
(d) 0.059 7 degree
15. (a) 1.93 &m (b) 3.003 (c) maximum
17. 48.0 &m
19. (a) 7.95 rad (b) 0.453
21. (a) and (b) 19.7 kN/C at 35.0° (c) 9.36 kN/C at 169°
23. 10.0 sin(100"t ( 0.927)
25. 26.2 sin(0t ( 36.6°)
27. "/2
29. 360°/N
31. (a) green (b) violet
33. 0.500 cm
35. no reflection maxima in the visible spectrum
37. 290 nm
A.58
Answers to Odd-Numbered Problems
F
O
I
39. (a) 7.10 cm (b) 0.074 0 mm (c) 23.3 MW/m
2
41. (a)
(b) Both images are real and
inverted. One is enlarged, the other diminished.
43. 1.24 cm
45. 21.3 cm
47. $ 4.00 diopters, a diverging lens
49. $ 3.70 diopters
51. $ 575
53. (a) $ 800 (b) image is inverted
55. (a) virtual (b) infinity (c) 15.0 cm, $ 5.00 cm
57. $ 40.0 cm
59. (a) 23.1 cm (b) 0.147 cm
61. (a) 67.5 cm (b) The lenses can be displaced in two ways.
The first lens can be displaced 1.28 cm farther away from
the object, and the second lens 17.7 cm toward the object.
Alternatively, the first lens can be displaced 0.927 cm
toward the object and the second lens 4.44 cm toward the
object.
63. q % 5.71 cm; real
65. 0.107 m to the right of the vertex of the hemispherical
face
67. 8.00 cm
p %
d
2
'
√
d
2
4
$
fd
O
F I
F
L
1
L
2
O, F
F
Ray diagram: