Choose the best answer.

1		Of the following properties of a wave, the one that is independent of the others is its __________________.
			A)	frequency
			B)	wavelength
			C)	speed
			D)	amplitude
2		When waves go from one place to another, they transport __________________.
			A)	amplitude
			B)	frequency
			C)	wavelength
			D)	energy
3		Sound waves are ________________.
			A)	longitudinal
			B)	transverse
			C)	a mixture of longitudinal and transverse
			D)	sometimes longitudinal and sometime transverse
4		Which one of the following waves cannot travel through a vacuum?
			A)	sound waves
			B)	radio waves
			C)	light waves
			D)	x-rays
5		The amplitude of a sound wave determines its ________________.
			A)	loudness
			B)	pitch
			C)	wavelength
			D)	overtones
6		An automobile sounding its horn is moving away from an observer. The pitch of the horn's sound relative to its normal pitch is ____________________.
			A)	higher
			B)	lower
			C)	the same
			D)	higher or lower depending upon the exact frequency
7		The Doppler effect occurs _________________.
			A)	only in sound waves
			B)	only in longitudinal waves
			C)	only in transverse waves
			D)	in all types of waves
8		A pure musical note causes a thin wooden panel to vibrate with the same frequency. This is an example of __________________.
			A)	an overtone
			B)	diffraction
			C)	resonance
			D)	interference
9		Maxwell based his theory of electromagnetic waves on the hypothesis that a changing electric field gives rise to __________________.
			A)	an electric current
			B)	a stream of electrons
			C)	a magnetic field
			D)	longitudinal waves
10		In a vacuum, the speed of an electromagnetic wave _________________.
			A)	depends upon its frequency
			B)	depends upon its wavelength
			C)	depends upon the strength of its electric and magnetic fields
			D)	is a universal constant
11		The energy of an electromagnetic wave resides in its ________________.
			A)	frequency
			B)	wavelength
			C)	speed
			D)	electric and magnetic fields
12		A fish that you are looking at from a boat seems to be 60 cm below the water surface. The actual depth of the fish __________________.
			A)	is less than 60 cm
			B)	is 60 cm
			C)	is more than 60 cm
			D)	many be any of the above, depending on the angle of view
13		Light of which color has the shortest wavelength?
			A)	0.5 A
			B)	2 A
			C)	unchanged
			D)	zero
14		The sky is blue because __________________.
			A)	air molecules are blue
			B)	the lens of the eye is blue
			C)	the scattering of light is more efficient the shorter its wavelength
			D)	the scattering of light is more efficient the longer its wavelength
15		Diffraction refers to _________________.
			A)	the splitting of a beam of white light into its component colors
			B)	the interference of light that produces bright colors in this oil films
			C)	the bending of waves around the edge of and obstacle in their path
			D)	the increase in frequency due to motion of a wave source toward an observer
16		Which one or more of the following will improve the resolving power of a lens?
			A)	increase the wavelength of the light used
			B)	increase the frequency of the light used
			C)	decrease the diameter of the lens used
			D)	increase the diameter of the lens used
17		The wavelength of sound waves having a frequency of 256 Hz compared with the wavelength of sound waves having a frequency of 512 Hz is half as great B. the same C. twice as great D. 4 times as great \A C \MC Waves in a lake are observed to be 5 m in length and to pass an anchored boat 1.25 s. apart. The speed of the waves is __________________.
			A)	0.25 m/s
			B)	4 m/s
			C)	6.25 m/s
			D)	impossible to find from the information given
18		A boat at anchor is rocked by waves whose crests are 20 m apart and whose speed is 5 m/s. These waves reach the boat with a frequency of _________________.
			A)	0.25 Hz
			B)	4 Hz
			C)	20 Hz
			D)	100 Hz