1. The highest frequency in visible light is associated with the color E
A. red.
D. blue.
B. orange.
E. violet
C. green.
2. An electromagnetic wave is created by D
A. an electrical charge moving at a certain
velocity.
C. a magnetic moving with a certain velocity.
D. an accelerating electric charge.
B. all electric charges.
3. What is the speed of light in a material that has an index of refraction of 2.0? B
A. 6.0 x 108 m/s
D. 5.0 x 108 m/s
B. 1.5 x 108 m/s
E. No such index can exist.
8
C. 2.0 x 10 m/s
4. What is the wavelength from a radio station having frequency 107.7 MHz? A
A. 2.790 m
D. 323.0 m
B. 27.90 m
E. 108.0 m
C. 32.30 m
5. A light ray reflects from a surface. If the angle of incidence is 24°, what is the angle that the reflected ray makes
with the surface? C
A. 24°
D. 48°
B. 12°
E. 102°
C. 66°
6. A light ray in air strikes a glass surface with an angle of incidence of 30.0°. The angle of refraction in the glass is
20.0°. What is the speed of light in the glass? D
A. 3.00 x 108 m/s
D. 2.05 x 108 m/s
B. 2.50 x 108 m/s
E. 1.50 x 108 m/s
C. 2.33 x 108 m/s
7. When light in material 1, which is in contact with material 2, undergoes total internal reflection, what condition
is necessary for their indices of refraction? B
A. n1 = 2n2
D. n1 = n2 + 1
B. n1 > n2
E. n2 = 1.5
C. n1 < n2
8. A spherical mirror has a focal length -20 cm. If an object is placed 10 cm in front of the mirror, where will the
image form? D
A. 20 cm in front of the mirror
D. 6.7 behind the mirror
B. 20 cm behind the mirror
E. No image will form
C. 6.7 in front of the mirror
9. A concave mirror has an object placed 40 cm in front of it. An image forms 60 cm in front of the mirror. What is
the focal length of the mirror? E
A. 60 cm
D. 100 cm
B. 120 cm
E. 24 cm
C. -120 cm
10. A concave mirror has a 12 cm tall object placed 40 cm in front of it. An image forms 60 cm in front of the
mirror. What is the size and orientation of the image? C
A. 8.0 cm, inverted
D. 18 cm, upright
B. 8.0 cm, upright
E. 24 cm, upright
C. 18 cm, inverted
11. A 25 cm focal length mirror has a 3.0 cm tall object placed 20 cm in front of it. Where is the image, and is it
real or virtual? D
A. 5.0 cm behind the mirror, virtual
D. 100 cm behind the mirror, virtual
B. 11 cm in front of the mirror, real
E. 45 cm behind the mirror, virtual
C. 100 cm in front of the mirror, real
12. A thin lens of focal length -12.5 cm has a 5.0 cm tall object placed 10 cm in front of it. What is the size and
orientation of the image? D
A. 4.0 cm, inverted
D. 2.8 cm, upright
B. 4.0 cm, upright
E. 100 cm, inverted
C. 2.8 cm, inverted
13. An object placed at a distance closer to a converging lens than the focal point always produces an image that is
C
A. The same size as the object
C. Virtual
B. Smaller than the object
D. Inverted
14. A farsighted person cannot see clearly closer than 2.0 m. What power contact lenses would correct this near
point to 25 cm? D
A. 2.0 D
D. 3.5 D
B. 0.5 D
E. -3.5 D
C. -0.5 D
15. A person has his nearsightedness corrected by lenses of -5.00 D. Without his glasses, his near point was 12.5
cm. With his glasses on, what is his near point? Assume the lenses are very close to eyes. C
A. 13.0 cm
D. 17.5 cm
B. 20.0 cm
E. 7.50 cm
C. 33.0 cm
16. A nearsighted person has a far point of 33 cm. What focal length contact lens would allow her to see in the
distance? B
A. 33 cm
D. -67 cm
B. -33 cm
E. 3.0 m
C. 67 cm
17. The refractive power of a lens of focal length 40 cm is C
A. 4.0 D.
D. -2.5 D.
B. 0.40 D.
E. 0.16 D.
C. 2.5 D.
18. The corrective lenses of a person suffering from which vision ailment could be used to start a fire? D
A. Myopia
C. Astigmatism
B. No eyeglass lenses can be used to make a
fire.
D. Hyperopia
A. 4.5 cm
D. 3.6 cm
B. 8.3 cm
E. 5.6 cm
E. Cataracts
19. A simple magnifier of refractive power 15.0 D is used to observe a beetle on a student’s desk. If the image of
the beetle is twice as large as the beetle itself, where is the image formed relative to the lens? B
C. 5.0 cm
20. A general condition that two waves undergo destructive interference is E
A. their phase difference is zero.
B. their phase difference is /2 rad.
C. their phase difference is 3//2 rad.
D. their phase difference is an even integral
multiple of  rad.
E. their phase difference is an odd integral
multiple of  rad.
21. A thin film of magnesium fluoride (n = 1.38) is applied to glass (n = 1.50) at a thickness of 100 nm. For what
visible wavelength will this coating act as nonreflecting? C
A. 600 nm
D. 504 nm
B. 578 nm
E. 491 nm
C. 552 nm
22. What minimum thickness of oil (n = 1.50) on the surface of water (n = 1.33) would give destructive interference
for 550 nm light with normal incidence? B
A. 275 nm
D. 80.0 nm
B. 183 nm
E. 78.0 nm
C. 92.0 nm
23. In a double-slit interference pattern, the third maximum from the central maximum corresponds to which value
of m? C
A. 1
D. 4
B. 2
E. 5
C. 3
24. Increasing the wavelengths in a double-slit experiment has what effect on the position of maxima on a
screen at fixed distance? C
A. None
D. Maxima get cancelled by minima.
B. Maxima get closer together.
E. Maxima pass minima on the screen.
C. Maxima get farther apart.
25. In a single-slit experiment, light of wavelength 500 nm is used to produce a diffraction pattern on a screen 4.0
m away. If the distance between both 3rd order minima is 6.0 cm, what is the slit width? A
A. 2.0 x 10-4 m
D. 0.67 x 10-4 m
B. 1.0 x 10-4 m
E. 0.44 x 10-4 m
C. 4.0 x 10-4 m