Physics Test 16A
 
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Physics Test 16A

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
The pitch of a sound is most closely related to the
a.
frequency of the sound waves.
b.
distance from the sound source.
c.
medium through which the sound travels.
d.
intensity of the sound.
 

 2. 
When a sound wave strikes your eardrum, it causes forced vibrations that are transferred to the
a.
brain.
c.
longitudinal canal.
b.
outer ear.
d.
hammer, anvil, and stirrup.
 

 3. 
The structure within the cochlea containing hair cells that vibrate at different natural frequencies is the
a.
eardrum.
c.
inner ear.
b.
basilar membrane.
d.
hammer and anvil.
 

 4. 
A sonar system measures distance by determining the
a.
density of a body of water.
b.
time it takes for sound to be absorbed.
c.
difference between regular sound waves and ultrasound.
d.
time it takes for sound waves to be reflected from a surface.
 

 5. 
Which type of electromagnetic waves has the highest energy?
a.
gamma rays
c.
infrared
b.
ultraviolet light
d.
microwaves
 

 6. 
Which type of electromagnetic radiation is used to kill cancer cells?
a.
microwaves
c.
ultraviolet rays
b.
gamma rays
d.
sunlight
 

 7. 
Radar works by sending a signal out from an air-traffic control tower that is
a.
analyzed by a Doppler scanner on the ground.
b.
reflected off a plane back to the control tower.
c.
increased in intensity as it passes through the atmosphere.
d.
scanned and analyzed by a receiver on board an airplane.
 

 8. 
Which statement about mirrors is incorrect?
a.
Flat mirrors create virtual images.
b.
Concave mirrors can create real or virtual images.
c.
Curved mirrors distort images by reflecting light according to the law of reflection.
d.
Only convex mirrors work according to the law of reflection.
 

 9. 
The color that an object appears to be depends on the
a.
angle at which visible light is reflected off the object.
b.
use of additive rather than subtractive colors.
c.
wavelengths of visible light that reaches your eyes.
d.
speed with which visible light reaches it.
 

 10. 
When light moves from a material in which its speed is higher to a material in which its speed is lower, it is
a.
bent toward the normal.
c.
reflected off the boundary.
b.
bent away from the normal.
d.
changed into a virtual image.
 

 11. 
Light rays that pass through a lens change direction because
a.
of internal reflection.
b.
they are refracted.
c.
light is broken up into many different colors.
d.
virtual images always appear slightly larger than real images.
 

 12. 
Which statement about the lens of the eye is incorrect?
a.
It is made of fibers.
c.
It has a fixed curvature.
b.
It is behind the pupil.
d.
It focuses light rays on the retina.
 

 13. 
Which of these affects the speed of sound?
a.
loudness of the sound
c.
temperature
b.
resonance
d.
direction of the wave
 

 14. 
Which of these affects the loudness of a sound?
a.
frequency of the waves
c.
pitch of the sound
b.
intensity of the waves
d.
speed of the sound
 

 15. 
Which of these affects the pitch of a sound?
a.
loudness of the sound
c.
intensity of the waves
b.
frequency of the waves
d.
resonance
 

 16. 
Nerve fibers send an impulse to the brain when the waves reach the
a.
cochlea.
c.
eardrum.
b.
hammer.
d.
anvil.
 

 17. 
To hear, which of the following takes place?
a.
The ear senses vibrations in the air.
b.
The ear amplifies the vibrations.
c.
The ear transmits signals to the brain.
d.
All of the above
 

 18. 
What causes the sound of a guitar to get louder as it is played?
a.
infrasound
c.
resonance
b.
pitch
d.
ultrasound
 

 19. 
Which of these is used to measure distance?
a.
infrasound
c.
antisound
b.
ultrasound
d.
All of the above
 

 20. 
Sonar uses
a.
the dispersion of sound waves.
c.
ultrasound.
b.
low-frequency sound waves.
d.
All of the above
 

 21. 
Which device uses sound waves to view organs inside the body?
a.
X-ray machine
c.
radar
b.
sonogram
d.
MRI
 

 22. 
Because its molecules are far apart, sound waves will travel slowly through
a.
cold air.
c.
iron.
b.
water.
d.
copper.
 

 23. 
Light demonstrates wave characteristics when it is
a.
reflected.
c.
diffracted.
b.
refracted.
d.
All of the above
 

 24. 
Light demonstrates particle characteristics when it
a.
knocks electrons off a metal surface.
c.
forms standing waves.
b.
passes through a narrow opening.
d.
All of the above
 

 25. 
As the frequency of light waves increases,
a.
the energy increases.
c.
the energy stays the same.
b.
the energy decreases.
d.
the wavelength increases.
 

 26. 
The rate at which energy flows through a given space describes light
a.
resonance.
c.
intensity.
b.
pitch.
d.
interference.
 

 27. 
Light rays reflecting off a smooth surface reflect
a.
in one new direction.
c.
in random directions.
b.
in the initial direction.
d.
None of the above
 

 28. 
Light rays reflecting off a rough surface reflect
a.
diffusely.
c.
at all angles.
b.
at a single angle.
d.
None of the above
 

 29. 
The law of reflection says the angle of incidence is _____ the angle of reflection.
a.
greater than
c.
equal to
b.
less than
d.
None of the above
 

 30. 
Reflection of light into random directions is called
a.
diffuse reflection.
c.
the angle of reflection.
b.
the law of reflection.
d.
the reflective ray.
 

 31. 
A virtual image
a.
appears in front of a mirror.
c.
diffuses light.
b.
appears behind a mirror.
d.
reflects light.
 

 32. 
An apple appears red to your eye because it
a.
emits red light.
c.
reflects red light.
b.
absorbs red light.
d.
distorts red light.
 

 33. 
When you look in a convex mirror, the image appears
a.
smaller than it really is.
c.
larger than it really is.
b.
lighter than it really is.
d.
darker than it really is.
 

 34. 
In addition to reflecting some light, every object
a.
transmits radio waves.
c.
produces vibrations.
b.
absorbs some light.
d.
None of the above
 

 35. 
A real image can be formed using a
a.
concave mirror.
c.
flat mirror.
b.
convex mirror.
d.
All of the above
 



 
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