Page 1663 - College Physics For AP Courses

Answer Key 1651
+0.360 m (concave)
59
(a) +0.111
(b) -0.334 cm (behind “mirror”) (c) 0.752cm
61
63

(25.61)
Test Prep for AP® Courses
1
(c)
3
(c)
5
(a)
7
Since light bends toward the normal upon entering a medium with a higher index of refraction, the upper path is a more accurate representation of a light ray moving from A to B.
9
First, measure the angle of incidence and the angle of refraction for light entering the plastic from air. Since the two angles can be measured and the index of refraction of air is known, the student can solve for the index of refraction of the plastic.
Next, measure the angle of incidence and the angle of refraction for light entering the gas from the plastic. Since the two angles can be measured and the index of refraction of the plastic is known, the student can solve for the index of refraction of the gas.
11
The speed of light in a medium is simply c/n, so the speed of light in water is 2.25 × 108 m/s. From Snell’s law, the angle of incidence is 44°.
13
(d)
15
(a)
17
(a)
19
(b)
Chapter 26
Problems & Exercises
1

3
(a)
(b) The size of the rods and the cones is smaller than the image height, so we can distinguish letters on a page.
5
(a)
(b) (c)
6
2.00 m