Download AP Physics B Waves and Optics Sample MC

AP Physics B
Waves and Optics
1.
All wave motion is caused by
(A) harmonic motion.
(B) transverse motion.
(C) vibrating objects.
(D) compressions.
(E) sinusoid functions.
2.
Frequency of a vibrating object doubles. The period is
(A) one fourth.
(B) one half.
(C) unchanged.
(D) doubled.
(E) quadrupled.
7.
In longitudinal waves the vibrations
(A) are perpendicular to the wave motion and light is the
best example of this wave.
(B) are perpendicular to the wave motion and sound is
the best example of this wave.
(C) are parallel to the wave motion and light is the best
example of this wave.
(D) are parallel to the wave motion and sound is the best
example of this wave.
(E) None of these.
8.
When waves are out of phase with one another they have
(A) different amplitude.
(B) different frequency.
(C) different wavelength.
(D) different alignments of their sinusoidal wave
function.
9.
When a wave strikes a medium that has a higher density
than the medium it is traveling in, the reflected wave
(A) is in phase and the sin function follows the same
curve out.
(B) is 180o out of phase with the original sin function.
(C) has increased speed.
(D) has decreased speed.
(E) More than one of the above.
A
E
B
D
C
3.
4.
5.
Which letter correctly identifies the wavelength?
(A) A
(B) B
(C) C
(D) D
(E) E
10. When a wave strikes a medium that has a lower density
than the medium it is traveling in, the reflected wave
(A) is in phase and the sin function follows the same
curve out.
(B) is 180o out of phase with the original sin function.
(C) has increased speed.
(D) has decreased speed.
(E) More than one of the above.
In a single period, a wave travels
(A) one quarter of a wavelength.
(B) one half of a wavelength.
(C) one wavelength
(D) two wavelengths
(E) four wavelengths
11. Standing wave result when reflected waves
(A) have higher speed than the incident wave.
(B) have lower speed than the incident wave.
(C) have matching wavelengths, but are 180o out of
phase with the incident wave.
(D) have equal amplitudes.
How fast a wave travels is determined by
(A) frequency
(B) wavelength
(C) amplitude
(D) wave type
(E) medium
12. Pitch in sound is
(A) wavelength.
(B) frequency.
(C) speed.
(D) amplitude.
A
E
B
D
C
6.
Which letter correctly identifies amplitude?
(A) A
(B) B
(C) C
(D) D
(E) E
Sample MC
13. Loudness in sound is
(A) wavelength.
(B) frequency.
(C) speed.
(D) amplitude.
14. Electromagnetic waves are caused by
(A) electric fields.
(B) electric force.
(C) magnetic fields.
(D) magnetic force.
(E) vibrating charges.
15. The wave with the longest wavelength is
(A) radio.
(B) infrared.
(C) visible light.
(D) X-rays.
(E) UV.
22. At and beyond the critical angle all the light striking the
boundary between two substances is
(A) refracted.
(B) reflected.
(C) absorbed.
(D) dispersed.
(E) transmitted.
16. The wave with the highest frequency is
(A) radio.
(B) infrared.
(C) visible light.
(D) X-rays.
(E) UV.
23. Lens and mirrors that spread light are
(A) convergent and have a positive focal point.
(B) convergent and have a negative focal point.
(C) divergent and have a positive focal point.
(D) divergent and have a negative focal point.
17. The wave with the greatest energy is
(A) radio.
(B) infrared.
(C) microwaves.
(D) visible light.
(E) UV.
24. An image appears on a screen.
(A) It is real and upright.
(B) It is real and inverted.
(C) It is virtual and upright.
(D) It is virtual and inverted.
25. An image is formed by a convex mirror.
(A) It is real and upright.
(B) It is real and inverted.
(C) It is virtual and upright.
(D) It is virtual and inverted.
18. When light moves from air to water the rays
(A) bend toward the normal.
(B) bend away from the normal
(C) are unaffected.
19. Long wavelengths
(A) bend the most.
(B) bend the lease.
(C) Wave length does not determine the amount of
refraction.
20. Light moves from one medium to another. If the change
in density is very large the refraction will be
(A) very large.
(B) very small.
(C) Density change does not determine the amount of
refraction.
21. An incident ray of white light passes from air into glass.
Refraction is greatest for
(A) red .
(B) orange.
(C) yellow.
(D) green.
(E) blue.
26. The bending of light around obstacles is called.
(A) refraction.
(B) reflection.
(C) diffraction.
(D) interference.
(E) Polarization.
27. The cause of diffraction is
(A) refraction.
(B) reflection.
(C) diffraction.
(D) interference.
(E) Polarization.
28. Diffraction is greatest when
(A) obstacles are small and slits are small compared to
wavelength.
(B) obstacles are small and slits are big compared to
wavelength.
(C) obstacles are big and slits are small compared to
wavelength.
(D) obstacles are big and slits are big compared to
wavelength.
29. Young’s Double slit experiment is the best evidence that
light is
(A) Particle called a photon.
(B) A wave phenomenon.
(C) Both of these.
1.
2.
3.
4.
5.
C
B
A
C
E
6.
7.
8.
9.
10.
D
D
D
B
A
11.
12.
13.
14.
15.
C
B
D
E
A
16.
17.
18.
19.
20.
D
C
A
B
A
21.
22.
23.
24.
25.
E
B
D
B
C
26.
27.
28.
29.
C
D
C
B