of Dept. Chemistry, Monmouth University, West Long Branch, NJ -07764
Chapter 6 Review
SC100 Dr. Kan Mudalige
Multiple Choice Questions Circle the letter that corresponds to the best response. Unless otherwise indicated, each question has only one answer.
1.
Which of the following is the same for all kinds of electromagnetic waves? frequency speed energy wavelength transmission through the atmosphere What is the velocity of a wave if the distance between the crests is 8 ft and 20 waves go by every 10 seconds? 32 ft/sec 16 ft/sec 8 ft/sec 4 ft/sec 160 ft/sec
a. b. c. d. e. 2.
a. b. c. d. e.
3. Sound waves with low frequency a. b. c. d. e. have large amplitudes if they are loud. travel at the same speed as sound waves with high frequency. have long wavelengths. have low pitches. all of the above
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SC100
Dept. of Chemistry, Monmouth University, West Long Branch, NJ -07764
4.
Which of the following is associated with 440 Hz? a. b. c. d. e. the tuning of a musical instrument to middle A an AM radio station broad band television a car rental desk seismograph data
5.
Bats navigate by emitting high pitched sound waves and a. b. c. d. e. scattering all objects in their path. attracting insects toward the sound. listening for an echo. calculating wave crests per second. none of the above
6.
Which waves are outside the range of a human's ability to detect? a. b. c. d. e. AM and FM waves ocean waves sound waves with frequencies less than 20 Hz sound waves with wavelengths greater than 3 cm All of the above can be detected by humans.
7.
Constructive interference is to destructive interference as a. b. c. d. e. a + a is to (-a) + (-a). a + a is to (+a) + (-a). rough is to smooth. b&c a&c
8.
Which wave does not move in a medium? a. b. c. d. e. ocean wave sound wave X-ray seismic wave All of the above require a medium for transfer.
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SC100
Dept. of Chemistry, Monmouth University, West Long Branch, NJ -07764
9.
The Doppler effect a. b. c. d. e. is used by birds to navigate at night. describes sound wave frequency from a moving source. describes sound wave frequency from a resting source. is used to interpret the electromagnetic spectrum. describes light wave refraction through a prism.
10.
What causes an electromagnetic wave to be emitted? a. b. c. d. e. wind on the water earthquakes bat echoes the acceleration of an electric charge all of the above
11.
Albert Michelson was the first U.S. scientist to win the Nobel Prize for a. b. c. d. e. his studies of light. his research into Greek history. proving Maxwell's equations. his discovery of the solar wind. his work with radioactive particles.
12.
How fast can light travel in one second, if it is moving through a vacuum? a. b. c. d. e. 186,000 feet 30,000 meters 18, 600 miles 300,000 kilometers 3,000,000 miles
13.
What is a practical use of infrared radiation detection? a. b. c. d. e. night vision for nocturnal animals to monitor volcanoes to find heat in homes to search for lost people all of the above
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SC100
Dept. of Chemistry, Monmouth University, West Long Branch, NJ -07764
14.
The frequency of a wave appears to change if there is motion between the wave source and the observer. This phenomenon is known as the Doppler effect. the wavelength paradox. electromagnetic radiation. solar wind. destructive interference. If you are standing in the path of a light moving toward you, the Doppler effect predicts that the light will be red shifted. blue shifted. shadowed. transmitted. radiated.
a. b. c. d. e. 15.
a. b. c. d. e.
16. Light passing through a window is like a. b. c. d. e. 17. a. b. c. d. e. 18. a. b. c. d. e. an image seen in a mirror. water being taken up by a sponge. radio waves passing through the air. a spectrum of colors in a glass pyramid. the greenhouse effect. Which is associated with radio waves? amplitude modulation 530 to 1600 kHz wavelengths longer than Earth's radius frequency all modulation of the above Which is the same for all types of electromagnetic waves? amplitude speed frequency length energy
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SC100
Dept. of Chemistry, Monmouth University, West Long Branch, NJ -07764
19. a. b. c. d. e. 20. a. b. c. d. e. 21. a. b. c. d. e. 22.
A light wave propagates itself through disturbances in the ether. reflecting gamma radiation. energy in shifting magnetic and electric fields the seismic energy of the sun. all of the above Compared to microwave radiation, infrared radiation has shorter wavelengths and higher energy. has longer wavelengths and lower energy. is neither felt nor absorbed by our skin. has longer wavelengths and faster velocity. is detected by all living things. Which radiation can be used to sterilize equipment? microwave radiation ultraviolet radiation fluorescence infrared radiation radio waves The fundamental difference between electromagnetic waves and other types of waves is that electromagnetic waves move more slowly than all other types of waves. are radioactive. are all invisible. can transfer energy without transferring mass. have the same wavelength. What practical use has been found for gamma rays? detecting the speed of a traveling car controlling destructive interference cooking food treating cancerous tissues carrying radio signals
a. b. c. d. e. 23. a. b. c. d. e.
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SC100
Dept. of Chemistry, Monmouth University, West Long Branch, NJ -07764
24.
The ability of microwave ovens to cook food depends partly upon the fact that microwaves a. b. c. d. e. are absorbed quickly by water molecules. are repelled by water molecules. are reflected by the interior of an oven. in ovens are significantly different from microwaves used for communication. are scattered by water molecules.
25.
Which statement best describes transverse waves? a. b. c. d. e. Transverse waves are a special type of longitudinal wave. A water ripple is a transverse wave. The transverse wave moves floating particles in the direction the wave is moving. The energy of the transverse wave moves perpendicular to the wave direction. Echoes are formed from transverse waves.
True False Questions 26. A wave carries energy but not matter across an intervening distance. Low frequency sound waves have high pitches. You can't see all wavelengths but you can hear all wavelengths. Visible light occupies the majority of the electromagnetic spectrum. In both longitudinal and transverse waves, the energy always moves in the direction of the wave. An electromagnetic wave can travel through a vacuum. The sun produces only visible electromagnetic radiation. The motion of waves depends upon the source from which they were generated.
27. 28. 29.
30.
31. 32. 33.
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Dept. of Chemistry, Monmouth University, West Long Branch, NJ -07764
34. 35.
Gamma rays have long wavelengths and high energy. The Doppler effect describes a higher pitch sound for waves approaching an observer and a lower pitch sound for waves moving away from an observer. In Maxwell's equations, the wavelength of radiation can vary but the sum of the wavelength and the wave frequency is always the speed of light. Your body produces electromagnetic radiation when you are taking this exam. All waves on the electromagnetic spectrum are the result of an accelerating electric charge. The radio waves on the electromagnetic spectrum have the shortest wavelengths and the highest energy. The AM radio stations can be heard over greater distances because frequencies between 530 and 1600 MHz are partially reflected off the layers of the atmosphere. Television broadcasts usually split the visual and sound signals, carrying pictures on AM and sound on FM. Nocturnal animals have learned to use microwave radiation. The human eye can distinguish many wavelengths of red and blue, but only a few wavelengths of yellow.
36.
37.
38.
39.
40.
41.
42. 43.
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